单词:noise-reducer nozzle
单词:noise-reducer nozzle 相关文章
for when you shut the bellows, the valve cannot close the air-hole because of your finger, 因为, 当你关闭风箱把手时, 你的手指使得阀门无法关闭空气进出的圆孔, and most of the air then escapes through this hole instead of g
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[00:00.98]Exercise 4 Listen to the scond part of [00:04.22]the radio programme.Take notes on the following [00:08.05]So,it's very important to control noise [00:10.78]pollution, isn't it? [00:11.81]That's right.As I said, [00:13.38]noise pollution is
You pump it at a high pressure through a nozzle. You create a spray of detergent. 你用高压将它压过一个喷嘴,你制造了清洁剂喷雾。 Then the spray dries. It turns into powder. It falls to the floor. 喷雾干燥后就成了粉末,
Voice 1 Welcome to Spotlight. I'm Liz Waid Voice 2 And I'm Joshua Leo. Spotlight uses a special English method of broadcasting. It is easier for people to understand no matter where in the world they live. Voice 1 Listen for a moment to the sounds ar