道阻且长，行则将至，行而不辍，未来可期；愿所有身在旅途者终能归家，愿所有前途迷茫者寻到方向；一应终末，皆为新生；未来再见！
The first statement is reasonable, but the second is not — for it disregards the extraordinary benefits that plastics, and the industry which produces them, have provided both to humans and to the environment.
【生词】
1. reasonable adj.有道理的、合情理的、讲道理的
2. disregard v.忽视、轻视；n.漠视、轻视
3. extraordinary adj.异乎寻常的、令人惊奇的、非凡的、卓越的
【解析】
① The first statement is reasonable是第一个分句，The first statement是主语，is是系动词，reasonable是表语，意思是：第一个说法是合理的；
② but the second is not是通过but连接的第二个并列分句，but是转折连词，the second是主语，省略了 statement，完整为 the second statement，is是系动词，not是表语，省略了 reasonable，完整为 is not reasonable，意思是：但第二个则不然；
③ for it disregards the extraordinary benefits that plastics, and the industry which produces them, have provided both to humans and to the environment.是for引导的原因状语从句，it是主语，代指the second statement，disregards是谓语动词，the extraordinary benefits作宾语，意思是：因为它忽视了巨大的益处；that plastics, and the industry which produces them, have provided both to humans and to the environment是that引导的定语从句，修饰先行词benefits，that在从句中作宾语，plastics, and the industry which produces them是从句的主语，which produces them是which引导的嵌套的小定语从句，修饰主语the industry，which在从句中作主语，produces是谓语动词，them作宾语，指代 plastics，定语从句的意思是：生产塑料的行业；have provided是谓语动词，both to humans and to the environment作状语，句子意思是：因为它忽视了塑料以及生产塑料的行业为人类和环境所带来的巨大好处；
【成分结构树状图】
[句子] The first statement is reasonable, but the second is not — for it disregards the extraordinary benefits that plastics, and the industry which produces them, have provided both to humans and to the environment.
│
├───[并列分句 1] The first statement is reasonable
│ ├───[主语] The first statement (第一个说法)
│ │ ├───[限定词] The (这个)
│ │ ├───[前置定语] first (第一个)
│ │ └───[核心名词] statement (说法)
│ ├───[系动词] is (是)
│ └───[表语] reasonable (合理的)
├───[并列连词] but (但是)
├───[并列分句 2] the second is not (第二个则不然)
│ ├───[主语] the second (第二个，指第二个说法)
│ │ ├───[限定词] the
│ │ └───[核心名词] second (省略了 statement)
│ ├───[系动词] is (是)
│ └───[表语] not (不，省略了 reasonable)
├───[破折号] — (表示解释说明)
└───[原因状语从句] for it disregards the extraordinary benefits that plastics, and the industry which produces them, have provided both to humans and to the environment.
│
├───[引导词] for (因为)
├───[主语] it (它，指代第二个说法)
├───[谓语] disregards (忽视)
└───[宾语] the extraordinary benefits (巨大的益处)
├───[限定词] the
├───[前置定语] extraordinary (巨大的、非凡的)
├───[核心名词] benefits (益处)
└───[定语从句] that plastics, and the industry which produces them, have provided both to humans and to the environment.
├───[关系代词宾语] that (指代 benefits，在从句中作宾语)
├───[主语] [并列主语] plastics, and the industry which produces them (塑料以及生产塑料的行业)
│ ├───[主语 1] plastics (塑料)
│ ├───[并列连词] and (和)
│ └───[主语 2] the industry which produces them (生产塑料的行业)
│ ├───[核心名词] the industry (该行业)
│ └───[定语从句] which produces them (生产它们的)
│ ├───[关系代词主语] which (指代 industry)
│ ├───[谓语] produces (生产)
│ └───[宾语] them (它们，指代 plastics)
├───[谓语] have provided (已经提供)
└───[状语：介词短语] both to humans and to the environment (既对人类也对环境)
├───[并列结构] both...and... (既...又...)
├───[状语 1] to humans (对人类)
│ ├───[介词] to
│ └───[宾语] humans (人类)
├───[并列连词] and
└───[状语 2] to the environment (对环境)
├───[介词] to
└───[宾语] the environment (环境)
【句意】第一个说法是合理的，但第二个则不然——因为它忽视了塑料以及生产塑料的行业为人类和环境所带来的巨大好处；
Regarding plastics, the benefits are very much greater than most people will allow — and so is the potential for managing the costs.
【生词】
1. regarding prep.关于、至于；v.看待、认为、注意
2. potential n.潜力、可能性、潜能；adj.潜在的、可能的
3. cost n.价钱、费用、成本、代价；v.需花费、估价、使丧失
【解析】
① Regarding plastics是介词短语作句首状语，说明谈论的话题范围，意思是：关于塑料、谈及塑料；
② the benefits are very much greater than most people will allow是第一个并列分句，the benefits是主语，are是系动词，greater作表语，than most people will allow是比较状语从句，与greater构成比较结构，most people作主语，will allow是从句谓语动词，从句省略了宾语that the benefits are great，意为：比大多数人愿意承认的程度；句子意思是：其益处远远超出大多数人所愿意承认的程度；
③ and so is the potential for managing the costs是第二个并列分句，属于倒装结构，and是并列连词，so是替代词，代替前一分句的谓语部分 are very much greater than most people will allow，is是系动词，与so一起构成倒装结构，，正常语序为 the potential is so，the potential for managing the costs是主语，for managing the costs 是介词短语作后置定语，修饰 potential，表示：管理成本方面的潜力；managing the costs是动名词短语，作for的宾语，句子意思是：成本管理的潜力也同样如此；
【成分结构树状图】
[句子] Regarding plastics, the benefits are very much greater than most people will allow — and so is the potential for managing the costs.
│
├───[状语：介词短语] Regarding plastics (关于塑料)
│ ├───[介词] Regarding (关于)
│ └───[宾语] plastics (塑料)
├───[并列分句 1] the benefits are very much greater than most people will allow
│ ├───[主语] the benefits (益处)
│ │ ├───[限定词] the
│ │ └───[核心名词] benefits (益处)
│ ├───[系动词] are (是)
│ └───[表语] very much greater than most people will allow (远远大于大多数人所愿意承认的程度)
│ ├───[程度状语] very much (非常、远远)
│ ├───[形容词比较级] greater (更大的)
│ └───[比较状语从句] than most people will allow (比大多数人所愿意承认的)
│ ├───[比较连词] than (比)
│ ├───[主语] most people (大多数人)
│ │ ├───[限定词] most (大多数)
│ │ └───[核心名词] people (人)
│ ├───[谓语] will allow (将承认)
│ └───[省略的宾语] (that the benefits are great) (益处有多大)
├───[破折号] — (表示语义衔接)
├───[并列连词] and (而)
└───[并列分句 2 (倒装结构)] so is the potential for managing the costs (成本管理的潜力也同样巨大)
├───[替代词] so (同样)
│ └─── 替代前一分句的谓语部分 “are very much greater than most people will allow”
├───[系动词] is (是)
└───[主语] the potential for managing the costs (管理成本方面的潜力)
├───[核心名词] the potential (潜力)
│ ├───[限定词] the
│ └───[核心名词] potential (潜力)
└───[后置定语：介词短语] for managing the costs (关于管理成本)
├───[介词] for (关于、对于)
└───[动名词短语] managing the costs (管理成本)
├───[核心动名词] managing (管理)
└───[宾语] the costs (成本)
├───[限定词] the
└───[核心名词] costs (成本)
【句意】就塑料而言，其益处远远超出大多数人所愿意承认的程度，而其成本管理的潜力也同样巨大；
注意：
在英语语法中，由 so 引导的倒装句，结构通常为：So + 助动词/情态动词/be动词 + 主语，其中的 so 指代的是前一句话中提到的肯定情况或事实。
具体来说，它的含义和用法如下：
1. 核心含义
指代内容：so 在这里是一个代词，意为“也是这样”、“也是如此”或“确实如此”。它代替了前文中已经出现过的整个谓语部分（包括动词、宾语或表语等），以避免重复。
语境要求：前一句话必须是肯定句。
主语关系：倒装句中的主语与前一句的主语通常是不同的人或物，表示后者具有与前者相同的特征或做了相同的动作。
2. 句型结构
So + be动词/助动词/情态动词 + 主语
如果前句是实义动词，后句用相应的助动词 (do/does/did)。
如果前句是 be 动词，后句用 be 动词 (am/is/are/was/were)。
如果前句有情态动词，后句用相同的情态动词 (can/must/should 等)。
