Barricades were erected to keep back the crowds.
设置了障碍，使人群无法靠近。
Dykes keep back the floodwater.
堤坎拦住洪水。
She struggled to keep back her tears.
她努力地忍住泪水。
I asked the spectators to keep back from the sideline.
我要求观众们不要走近边线。
She was unable to keep back her tears, and wept freely.
她无法控制自己的眼泪，放声地哭了起来。
She sat down quietly, but she couldn't keep back her tears.
她静静地坐下来，却忍不住流下了眼泪。
The soldiers flooded the countryside in order to keep back the enemy.
士兵们涌进乡村以击退敌人。
The police put up barricades to keep back the crowds during the procession.
警察设置了街垒，阻止行进的人群。
The soldiers broke the dikes and flooded the countryside to keep back the enemy.
士兵们破坏堤坝淹没乡村以阻挡敌人。
At the same time, watch any vehicles in front of you on the ramp and keep back a safe distance.
同时，注意观察你前方同在匝道上驶行车辆并保持安全的距离。
The Stockholders agreed to let their company keep back a part of its profits for reserve funds.
股东们同意让公司一部分利润作为公积金。
Mr Gates was haunted by Mr Christensen's insight-he even asked for his help to keep back the tide.
盖茨是克里斯坦森的视线里神出鬼没，他甚至要求阻止这股浪潮。
"I was only trying to do a good idea," Linda thought, "and now..." She couldn't keep back her tears.
“我只想做一件好事，”琳达心想，“但是现在……”她的眼泪阻止不住流下来。
Becky clung to his side in an anguish of fear, and tried hard to keep back the tears, but they would come.
贝基极度痛苦地紧跟在汤姆身旁，竭力想止住眼泪，可是眼泪还是流出来。
Martin shook his head, but he had failed to keep back the wolfish, hungry look that leapt into his eyes at the suggestion of dinner.
马丁摇摇头，但是他听见吃饭时眼里所流露出的饿狼般的馋相，却无法掩饰。
To maintenance regularly, maintenance, luster, dust removal, cleaning, is unable to make beautiful stone luster to be continued to keep back.
要定期保养、维护光泽、除尘、清洁是无法让亮丽的石材光泽待续保持不退的。
'If I'd been the whiting,' said Alice, whose thoughts were still running on the song, 'I'd have said to the porpoise, "Keep back, please: we don't want YOU with us!"'
“如果我是鳕鱼，”爱丽丝说，脑子里还想着那首歌，“我会对海豚说，'远一点，我们不要你同我们在一起！'”！
The new method introduced in the city's downtown area requires traffic wardens to pull a rope across the pavement when the pedestrian's red light is on, to keep back pedestrians and bicyclists.
这一新举措在该市城区实行，要求交通协管员在行人红灯亮起时拉起绳子阻断人行道，以阻止行人和骑自行车的人通过。
Tom saw his opportunity, "Lookyhere, Huck, being rich ain't going to keep me back from turning robber."
汤姆看到了他机会，说：“喂，哈克，有钱也阻止不了我当强盗。”
If the two media have really different densities, like air and water, then most of the energy is going to be reflected back, very little of it will keep going and get transmitted into the new medium.
而如果这两种介质的密度相差较大，就像空气和水那样，那么大部分的能量将会折射回来，只有一小部分会继续传播进入到新的介质中。
I will give you some land and the old house in the back of the ranch if you keep the horse there.
如果你让这匹马在那儿，我将把一些土地和牧场后边的那座老房子给你。
It is true in life that if we just keep going forward without looking back, we are more likely to reach our goals.
在生活中，如果我们只是勇往直前而不回头，我们更有可能实现我们的目标。
To help generate lift to keep midwater, the top of the tail extends farther back than the bottom, creating a slant along the back edge.
为了保持在水中不至于沉底，尾部的顶端比底端向后延伸，沿着后端形成一个斜面，产生提力。
For men, one of the best places to keep a wallet is in the back pocket of tight trousers.
对于男性来说，存放钱包的最佳位置之一是紧身裤后面的口袋。
They believe that the best we can do is keep it at a reasonable level, and at present the only serious option for doing this is cutting back on our carbon emissions.
他们认为，我们所能做的最好的事情就是把它控制在一个合理的水平，而在这方面目前唯一重要的选择就是减少碳排放。
Identify the kinds of interests they keep coming back to, as these offer clues to the careers that will fit them best.
要确定他们能够坚持的兴趣爱好，因为这些爱好暗示了什么样的职业最适合他们。
Identify the kinds of interests they keep coming back to, as these offer clues to the careers that will fit them best.
要确定他们能够坚持的兴趣爱好，因为这些爱好暗示了什么样的职业最适合他们。
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