1. lessen /ˈlesn/
v.(使)变小，变少，减弱，减轻
to lessen the risk/impact/effect of sth
减少某事物的风险╱影响╱效果
2. call for
(1) call for ab 去接某人
(2) call for sth 需要;公开要求 (≈ require)
The new situation in this area calls for a change in our financial policies.
这方面的新形势要求我们改变财政政策。
3. require /rɪˈkwaɪə(r)/
v.需要;要求(≈ call for);规定
The wearing of seat belts is required by law.
法律规定必须系安全带。
4. call off
call sth off 或者 call off sth ：取消，停止进行
to call off a deal 取消交易
5. call on
call on sb 或者 call upon sb
(1) 邀请，要求(某人讲话等);恭请
I now call upon the chairman to address the meeting.
现在请主席向大会致辞。
(2) 请求，要求，要(某人做某事)
6. call up
(1) call sb up ①打电话给 ② 征召(服役);征召入伍
(2) call sth up 使回忆起;使想起(≈ recall)
7. suggest /səˈdʒest/
v. 建议;提议(≈ propose)
I suggest (that) we go out to eat. 我提议我们出去吃吧。
8. demonstrate /ˈdemənstreɪt/
(1) v. 证明;证实;论证;说明
It has been demonstrated that this drug is effective.
这药已证实是有效的。
(2) 表达;表露;表现;显露
9. identify /aɪˈdentɪfaɪ/
v.确认;认出;鉴定
First of all we must identify the problem areas.
首先我们必须找出问题所在。
10. at large
详尽的;未被捕的
Her killer is still at large.
杀害她的凶手仍然逍遥法外。
