重點講解：
1. be responsible for 對(某事物)負責的 ；
例句：Local authorities have been responsible for the running of schools in their areas.
地方當局一直負責管理本地區的學校(GFcq8Oc.eS0。
2. keep sb. from doing sth. 阻止（或防止、阻礙）…做；
例句：I tucked some plastic wrap around the sandwiches to keep them from getting stale.
我用塑料包裝紙把三明治裹起來，防止變質djP@DW6A&9Hwb(r。
3. go down （價格、水平或數量）下降，下跌；
例句：Income from sales tax went down.
來自銷售稅的收入下降了2j9c5)j&4%%。
4. by any means 無論如何；
例句：You must finish the work in time by any means.
你無論如何都要及時完成這項工作t+MlN!uLP.inbc)Lb7。