2020年军队职称英语考试理工类常考同义词组辨析(5)

　1. again and again, now and again, once again, once and again, over again, time and again , time and time again ,over and over again 这些短语都可作状语，形容某种行为的反复，其中again and again，now and again，once and again ，time and again，time and time again 和over and over again 都强调做某事的多次重复性. 意为 “再三地，三番五次地，反复地” 可相互换用。它们在句中的位置比较灵活，可置于句首、句中或句末：He makes the same mistakes again and again. “他一再地犯同样的错误。”Those results had been repeated, time and time again, in laboratories all over the world.“那些结果在全世界的实验室里再三地被重复。”Now and again I saw John walking along the park. “我三番五次地看到约翰沿着公园散步。” 置于句首时，起强调作用。而once again 和over ogain 强调按原来的方式重复一次，意为 “再一次，又一次” 两者可以换用，一般置于句中或句末：Let's try once again. 让我们再试一次。I’m sorry to trouble you，but will you tell me all that over again?“很抱歉打扰你，你能把那一切再告诉我一遍吗?”