eyelid
You may not be aware that you bat your eyelids many times a day. However, sometimes you have a lotto do and have to work all night, then you will not bat an eyelid. Nor will you bat an eyelid in face of danger if you have iron nerves.
Generally, it is impossible for anything to hang on the eyelids. It is too bad if something, say, a project, does hang on by the eyelids, for that means it is in imminent danger.
眼皮，眼睑
你每天眨眼皮无数次，自己可能没有发觉这一点。有时你有许多事情要做，不得不整夜工作，于是你就会not bat an eyelid（没合眼睡觉）。面对危险，如果你意志坚定，你也会not bat an eyelid（泰然自若）。
眼皮一般是挂不了任何东西的。如果真有什么事情，例如一项计划hang on by the eyelids,那就很不妙了，因为它的意思是说，这事情危在旦夕。
