一、高级替换词 (1)同意agree →consent (2) 经常often→frequently (3) 大约地about → roughly (4) 必须must→ it is a must for us to (5) 知道know→ be aware of (6) 因为because→in that (7) 最后at last→eventually (8) 然而but→however (9) 如果if→provided that (10) 很多many→ numerous (11) 引起，导致lead to→contribute to (12) 人people→individuals (13) 好的good→desirable, beneficial (14) 坏的bad→undesirable (15) 总是always →constantly