单词:back siphonage
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Welcome to the second part of our Business English Pod series on how to support your position or argument in meetings. Our friend Jack is giving an update on the Costa Rican project. Dan is against the idea, because as production manager, he doesnt w
第一章 练习41 Exercise 1-41:Supporting Words Exercise 1-41: Supporting Words For this next part of the intonation of grammatical elements, each sentence has a few extra words to help you get the meaning. Keep the same strong intonation that yo
There is a special day to recognize the importance of the ozone layer. In 1995, the United Nations General Assembly decided September 16th is the International Day for the Preservation of the Ozone Layer. This is the date on which countries signed th
I first heard about the ozone layer about twenty years ago. I was still in school. I thought it was interesting, but I didnt take it seriously. It was a bit like science fiction, I mean, how could there be a giant hole in the atmosphere? Over the yea