- 1.(不知道) not to know; have no idea of; be ignorant of; be in the dark; be all at sea; know nothing about; be the last person to know; be not aware of; without the knowledge of; be beyond sb.; not to hear about; it beats me.; not to have a clue 短语和例子
2.(表示疑问或请求) wonder if 短语和例子
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