gear down . change into a lower gear in order to lose speed使汽车换慢档；使车辆减速

Going down a steep grade，the driver geared down the car．下陡坡时，司机放慢了速度。

The driver geared down as he came into the corner．司机拐弯时换了慢档。

 gear down . reduce in force or intensity减弱；降低

The courses have been geared down to the lower ability of students in the special classes．对水平较低的特殊班级的学生，已经降低了一些课程的要求。

The dosage was geared down to a level which would work on the infected cells but not upset their normal metabolism．药量减到了一定程度，既能对受感染的细胞起作用，又不影响正常的新陈代谢。

be geared to . 安排（调节）以适应

Education should be geared to the children's needs and abilities，教育应与孩子们的需要和能力相适应。

gear up . change（a car，）into a higher gear车辆换快速档

We'd better gear up our car，or we'll be late．我们最好加快车速，否则要迟到了。

gear up .speed up；increase使加快速度；增加

They have been gearing up production in order to fulfil their task ahead of time．为了提前完成任务，他们一直在加速生产。

gear up .make ready作好准备

I hope you are all geared up for the new sales campaign．我希望你们都为新的销售活动作好准备。

He geared himself up for the interview．他为面试作好了准备。

Our department is gearing up for an increased intake of students．我们系正准备招收更多的学生。

get hold of . catch hold of . get possession of ；grasp 握有；持有

It is dangerous for children to get hold of sharp knives．孩子拿着尖刀是件危险的事情。

He caught hold of a rope and saved himself．他抓住一条绳子，救了自己的命。

get hold of . catch hold of . find 找到

Mr．Thompson spent several hours trying to get hold of his lawyer．汤普森花了几小时想找到他的律师。

get the jump on . have the jump on . get ahead of；start before others； have an advantage over 占优势；领先；胜过

Mr．Lin got the jump on us by seeing the manager before we did．林先生捷足先登在我们前面会见了经理。

Don't let the other students get the jump on you at the beginning of the race．比赛一开始就不要让其他学生占你的优势。

get about . go or travel from place to place 来往各处；旅行

People are getting about much more than they used to．人们比以前旅行多得多了。

John gets about all over Europe，even though he hasn't got a car．尽管约翰没有汽车，但他游遍了欧洲。

With trains，ships and planes，people can get about much more easily nowadays．如今有了火车、轮船和飞机，人们往来各处就方便多了。

get about . be able to move again after illness ； walk； go about（病后又能）走动；到处走动

He was ill last week，but he is getting about now．他上周病了，但现在能走动了。

Old people can't get about very well in the winter weather．在冬季，老人走路不大方便。

For some months after her accident she had to get about on crutches．那次事故以后好几个月，她不得不依靠拐杖走路。

All this snow and ice makes it difficult for people to get about．冰天雪地使人难以走动。

get about .（of news，） spread（新闻等）传播开

The news of his resignation soon got about．他辞职的消息很快就传开了。

The story has got about everywhere．这事传遍了各处。

Let's prevent the rumour from getting about．让我们防止谣言到处传播。

How did the story of her marriage get about? 她结婚的消息是怎样传开的?

get abroad . be able to travel to a foreign country到国外旅行

We didn't get abroad for our holiday as usual； we couldn't afford it this year．我们没有象往年那样出国度假，今年我们拿不出这笔钱。

get abroad . spread； become widely known 传（播）开

The rumor has got abroad．谣言已经传开了。

 get across . （cause to）cross a road， water，（使）通过

Using the new bridge to get across will save people a lot of time．从新桥上通过可以节省人们大量时间。

The general had to get his troops across the river．将军必须把部队带过河去。

When the traffic lessened， they managed to get across．车辆减少时，他们设法穿过了马路。

 get across . （cause to）become understood or accepted（使）理解；把…讲清楚

I spoke slowly，but my meaning didn't get across．我讲得很慢，但我的意思还是没有被理解。

The advertisement's basic message gets across very well．这条广告的基本信息表达得一清二楚。

He found it difficult to get his American jokes across to an English audience．他发觉他的美国笑话很难使英国听众发笑。

The teacher tried to explain the problem but the explanation did not get across to the class．老师试图把这个问题解释清楚，但是他的解释没有被学生理解。

He gets across well， doesn't he? 他说的很清楚，是不是?

 get across . annoy； offend； form a bad relation with使生气；触犯；与…搞坏关系

They really get across me！他们实在使我生气。

She got across the boss， who made life very difficult for her．她得罪了老板，老板使她的日子很不好过。

These two girls are so different in temperament that they were bound to get across each other．这两个女孩的性格相差太悬殊，彼此肯定合不来。