查询词典 utter sth.

Insist on doing sth.;persist in doing sth.

坚持做某事

Invite sb to do sth./be invited to do sth.

邀请某人做某事、被邀请做。。

They invited us to lunch. invite sb. to sth./ do sth.

邀请某人到某个地方或做某事

Invite sb. to sth./ invite sb. to do sth.

邀请某人到…/邀请某人做

It is a time for sth/to do sth.

该是……的时候了

Keep at sth/doing sth.

坚持做某事。

Keep on doing sth. keep doing sth.

是继续不停地做某事

Keep on doing sth:continue doing sth.

不断做某事。

Keep sb. from doing sth.: stop sb. from doing sth.

阻止某人做某事，防止某人做某事

Keep one's mind on sthbcontinue to pay attention to sth; not be distracted from sth

继续专心於某事物；不因某事物分散注意力

We are forbidden from giving money to these shoeless, skinny children, as this will perpetuate begging.

向光着脚，骨瘦如柴的孩子施舍是不可以的，因为要招来无休无止的乞讨。

It would be hard not to fall victim to some sharpeyed policeman.

要想不被某个目光锐利的警察抓到，谈何容易。