382. in ignorance of 不知道…
383. be ignorant of ( = lacking knowledge) 對…不了解,不知道
384. (an) impact (on) 對…的強烈影響
385. impose…on 把…強加給
386. impress…on 給…留下印象
387. make (leave) an impression on sb. =give sb. an impression 給…留下印象
388.under the impression that有..的印象,認為
389. improve sth.(make sth. better)把原物改進 improve on(=produce or be sth. better than…) 另做一物比原物更好
390. improve in (=get better) 有改進, 好些
