She was unable to keep back her tears.
她无法忍住泪水。
Barricades were erected to keep back the crowds.
设置了障碍，使人群无法靠近。
Keep back straight and bend knees.
背要直，只弯两膝。
别往前走了！车开过来了。
The fireman told me to keep back.
消防队员要我站远点。
She struggled to keep back her tears.
她努力地忍住泪水。
She tried to keep back her indignation.
她试图抑制住她的愤怒。
But the fire could not keep back the policemen.
但火焰不能阻挡警察们的步伐。
Keep back! The building could collapse at any moment.
别靠近！那建筑物随时可能倒塌。
To keep back, as for future use or for a special purpose.
保留，收藏：保留，如用于将来使用或某一特殊的目的。
Deeply moved by the play, she could hardly keep back her tears.
她被那出戏深深感动了，禁不住流下了眼泪。
The soldiers flooded the countryside in order to keep back the enemy.
士兵们涌进乡村以击退敌人。
So, you will keep back the tears, because I believe that a happy ending.
所以，巨蟹会忍住泪水，因为相信着美好的结局。
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。
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。
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。
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。
Why do they keep passing back to the goalie?
他们为什么总是把球回传给守门员？
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。
Do go back and keep an eye on the children.
回去看看孩子们。
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