191．on a diet 吃某种特殊饮食，节食

192．differ from……in 与……的区别于……

193．in difficulties…… 有困难，处境困难，

194．discharge sb. (from)……for (=dismiss sb. from a job for) 因……解雇，开除

195．fall back (=retreat, turn back) 撤退；in disorder慌乱地，狼狈不堪

196．on display (＝being shown publicly) 陈列

197．dispose of (=get rid of, throw away) 处理掉

198．beyond dispute 不容争议的，无可争议

199．in dispute 在争议中

200．in the distance 在远处．make out 辩认出

201．(be) distinct from ( = be different from) 与……截然不同

202．distinguish between (=make or recognize differences) 辨别

203．distinguish……from 把……与……区别开

204．do away with (=get rid of; abolish; discard eliminate ) 除去，废除，取消； do away with (=kill) 杀掉，镇压

205．have……to do with 与……有关系

206．without doubt (=undoubtedly) 无可置疑地

207．in doubt (=in a condition of uncertainty ) 对……表示疑惑

208．be due to 是由于

209．come off duty 下班

210．go on duty 上班