blow-back

基本解释

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。