Though the law will require emissions testing of all diesel vehicles, from tractor trailers to excursion buses, it will have no effect on sport utility vehicles, almost all of which are gasoline powered and therefore they are not subject to emissions-control standards as stringent as those of diesel-powered vehicles.
语法 Sentence Correction-2480
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正确的用户笔记
hxq1994 2016-01-07 17:16:18
they are和all of which不平行；of 和standard不匹配
qiyeran346 2014-10-06 16:15:42
therefore is an adv verb, correct should be a comma before and
froyo 2016-10-14 19:11:54
从句和主句不能平行
LM檬先森。 2016-06-10 20:24:32
they 指代不明确
lkid 2015-10-09 12:06:56
therefore后面they are多余，不简洁 STANDARD是针对各种交通工具制定的，应该用介词FOR，如果是OF的话就变成这些交通工具的STANDARD了，不合逻辑。
Letitia啊小啦 2015-04-11 17:06:01
standard of vs. standard for
merylluo 2014-09-02 19:14:07
THEY ARE多余 可以0省略 而且STANDARD是针对各种交通工具制定的，应该用介词FOR，如果是OF的话就变成这些交通工具的STANDARD了，不合逻辑。
