提高警惕的英文

The flu is not simple,we must keep fully alert.

It is of no use+doing sth(做什么事情是没有用的) ,或者 It is useless for sb to do sth （对某人来说，做某事是没有用的）所以 上面应该是 It is of no use taking care..... 或者It is useless for us to take care.....

upgrade,raise,heighten,enhance,increase,improve都有提高的意思;但每个词的搭配都不一样.enhance是指技术上的提高raise 提高水位,提高警惕,提高工作效率improve 提高生活水平,提高技术水平increase 提高工作量,一般指数量上的提高

The flu is absolutely simple, we must remain vigilant

提高increase; raise; enhance; heighten; advance这些学生的听力提高了。The students have improved their listening. 随着自动化程度和效率的不断提高，对管理人员的技能要求可能会大大降低。Administrative staff may be deskilled through increased automation and efficiency.

We should be vigilant