用在动词之前，表示允许做某事。
Used before a verb, to indicate permission to do something.
youdao
也可以表示允许某人做某事，但比较正式。
"May" is also used to give permission, but this is more formal.
这是类似于许可证的通过证，它能够允许你做某事，进入某地。
A pass is similar to a permit; it allows you to do something, to enter somewhere.
一张“许可证”就是允许你做某事；
A "permit" allows you to do something;
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