be supposed to do什么意思?

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besupposedtodo什么意思?besupposedtodo什么意思?besupposedtodo什么意思?应该干、被要求做什么、被期望在...

be supposed to do什么意思?
be supposed to do什么意思?

be supposed to do什么意思?
应该干、被要求做什么、被期望在...