求问一个英语语法题T TThe Environmental Protection Agency frequently puts mandatory controls on toxic substances that present as little risk as one chance in a million of causing cancer.中as 和 as之间为什么可以 用名词 little risk?

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求问一个英语语法题T TThe Environmental Protection Agency frequently puts mandatory controls on toxic substances that present as little risk as one chance in a million of causing cancer.中as 和 as之间为什么可以 用名词 little risk?
求问一个英语语法题T T
The Environmental Protection Agency frequently puts mandatory controls on toxic substances that present as little risk as one chance in a million of causing cancer.中
as 和 as之间为什么可以 用名词 little risk?
这是什么用法 没分了求帮助T T

求问一个英语语法题T TThe Environmental Protection Agency frequently puts mandatory controls on toxic substances that present as little risk as one chance in a million of causing cancer.中as 和 as之间为什么可以 用名词 little risk?
as little risk as:
as2:好比
as1:那样
如下:
好比One chance in a million 那样 little risk
中文要反过来.
提醒:这是as的特殊用法,不要把它当规则.
比如:As I was saying:像我说的一样.这里as是‘像’.

as...as短语

好像, 好比,比方。。。

as...as...就是好像...一样的意思
例子:as fast as horse 好像马一样快