maintain 四级

1.maintain a family.

供家庭

2.maintain good relations.

维持良好的关系

3.maintain one's composure.

保持冷静

4.maintain two cars.

保两辆小汽车

5.maintain one's family

家

6.maintain that the theory is wrong

坚持说那理论是错误的

7.enough food to maintain life.

足够维持生命的食物

8.maintain a close contact

保持密切接触［联系］

9.The government maintains the law.

政府维护法律。

10.slack in maintaining discipline.

在遵守纪律方面疏忽的

11.maintain a strict silence on sth.

对某事保持严格的沉默

12.to maintain the status quo

维持现状

13.Food is necessary to maintain life.

食物是维持生命所必需的。

14.It is clearly illogical to maintain such a proposition.

坚持这种主张显然是没有道理的。

15.The idea is to maintain the regularity of the heartbeat.

问题就是要维持心跳的规律性。

16.they maintain antediluvian sex-role stereotypes.

他们保持着早就过的性别角色。

17.they maintained an arm's-length relationship.

他们保持着一种疏远的关系。

18.maintained her innocence.

坚持她的清白无辜

19.maintain manifold links with...

...有千丝万缕的关系

20.maintaining an even tempo;

保持稳定速率；