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Take care not to let the gas in the tube blow back. 当心别让管子里的煤气倒燃（爆炸）。
In this case, the gas may blow back into the room. 这种情况下，气体可能泄露，进入房间。
Take care not to let the gas in the test tube blow back. 当心别让试管里的气体爆炸。
"When Harry Potter got out I think you could actually see his hair blow back from the screams," Thomas said. 托马斯说："哈里·波特出来的时候，我想你真的可以看到他的头发被尖叫声吹到后边去了。
If permissible to blow back into the line, any purging medium such as air, inert gas, steam, or flushing oil may be introduced through this connection. 如果允许吹回到管路内，则任何冲洗介质，如空气，惰性气体，蒸汽，或冲刷油都可以通过这个连接引入。
Then may He give me the strength to unhorse you and send you with the blow back across the sea. 也许上帝会给我力量把你从马上打下来,然后伴随一场爆炸把你送回海的那一边。
FXD does not have any free carbon in the preheat flame and does not blow back in the torch. FXD的预热火焰没有自由碳，不能进行黑色金属之间的焊接。
The differential pressure transmitter is equipped with amputator and blow back plug, in order to maintain and clean dust in transmitter pipe. 差压变送器设有切断阀组和反吹甩头，便于检修和清理变送器接管内的粉尘。
The old man was exhilarated when his lost wallet blew back, into his hand. 老人的钱包失而复得；他喜出望外。
The old man was exhilarated when his lost wallet blew back,into his hand. 老人的钱包失而复得；他喜出望外。
If the gas blows back, you must turn off the supply, as it is dangerous. 如果煤气管漏气, 你必须关闭送气管, 因为那很危险。
The blow sent him spinning back against the wall. 他被打得晕头转向，撞在後面的墙上。
Rose bushes shoot again after being cut back. 玫瑰丛修剪後还能再长出新枝。
The black robes billowed, and the hood on the nearest blew back, spilling a flurry of gleaming white hair. 黑色的长袍在风中飞舞，走到近处的这一个，兜帽被风掀起，露出一卷隐隐闪光的白发。
I was dazed by the blow on my head. 我的头挨了一击而觉得晕眩。
Let's go for a walk and blow the cobweb away. 咱们去散散步，清醒一下头脑。
It was a great blow to her when her mother died. 她母亲去世对她是个沉重的打击。
Rain clouds are banking up. Hope they'll blow over. 雨云正在聚积起来。希望它们会散去。
Then as the plug valve is lifted off its seats, any accumulation below the plug or on the seats will be blown back into the line. 然后，当旋塞阀升离阀座时，任何累积在阀塞或阀座上的吹入物质都将被吹回到管路内。
The fellness of the blow staggered him. 那凶猛的一击使他站立不稳。