摘要:Not until -在句首.主句用倒装. 例如:Not until the early years of the 19th century did man know what heat is. 直到19 世纪初.人类才知道热能是什么. Not until I began to work did I realize how much time I had wasted. 直到我开始工作.我才认识到了我已蹉跎了几多岁月.

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