1、effective

有效的;能产生预期效果的

The project looks at how we could be more effective in encouraging students to enter teacher training.

该项目着眼于我们如何能够更加有效地鼓励学生参与教师培训。

Simple antibiotics are effective against this organism.

一般的抗生素能够有效对抗这种微生物。

实际的;事实上的

They have had effective control of the area since the security forces left.

自从安全部队撤离后，他们实际上控制了该地区。

a restructuring that would have resulted in an effective increase on one of their most popular excursion fares.

原本会使他们最热门的一条短途旅游线路的费用出现实质性上涨的调整

（法律、协议等）生效的，起作用的

The new rules will become effective in the next few days.

新规定将在几天后生效。

2、shelter

(躲避恶劣天气或危险的)遮蔽物，庇护处，掩体

The city's bomb shelters were being prepared for possible air raids.

为防御可能发生的空袭，该城市正在建防空洞。

a bus shelter.

公共汽车候车亭

(尤指躲避恶劣天气或危险的)遮蔽，庇护，掩蔽

The number of families seeking shelter rose by 17 percent.

寻求避难的家庭户增加了 17％。

Although horses do not generally mind the cold, shelter from rain and wind is important.

尽管马一般不怕冷，但是一定要有个能遮风挡雨的马棚。

为(受到警察或其他人追捕的人)提供避难所;窝藏;庇护

A neighbor sheltered the boy for seven days.

一个邻居收留了这个男孩在他家藏了 7 天。

people sheltering illegal immigrants.

为非法移民提供庇护的人们