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oward. ? Tips :在一般情況下, upon 與 on 可互換使用,但在某些習慣用法中不能互換,如:once upon a time Gutter n. ? 1. the low part at the edge of a road where water collects and fiows away ? 2. an open pipe fixed to the edge of a roof to collect and carry away rain water ? gutter:the bad social conditions of the lowest and poorest level of society v ? unsteadily, feebly, or low。 ? The above four binations have the practical value to the treatment of malignant tumor. 以上四個結合,對于指導惡性腫瘤的臨床具有實用價值 . metaphysics ( philosophical study of being and knowing) ? As a matter of fact, idealism, metaphysics and poisonous weeds are found in every country. 事實上,無論哪個國家,都有唯心主義,都有形而上學,都有毒草。t all the lawyers pull out? asks its spokesman. 發(fā)言人說:“為什么不所有的律師都退出呢? ? As he hopelessly watched the train pull out of the station. 他無奈地看著火車開出了車站。 dusty adj. ? 1. covered with a layer of dust ? 2. lacking originality or spontaneity。 go back to (return, e (or go) back) ? Few expect the generals to go back to their barracks soon. 沒人希望將軍們馬上回到他