单词：mean column pressure
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A: Youre new here, right? B: Yes, I am. A: Will this be your first year? B: No, I transferred here. A: What school did you come from? B: I transferred from PCC. A: Whyd you transfer here? B: I wanted to attend this school originally, but my grades ou
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hang on to your hat to keep something under your hat 要是你头上根本没有戴帽子，而有人对你说：Hang on to your hat. hang on就是抓住的意思，所以Hang on to your hat从字面上
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sorry,本课音频缺失。 今天我们再来给大家介绍两个以
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And farming fuelled the growth of another habitat, one that would become an even bigger challenge to North America's wildlife. The modern city was born. The city is an artificial environment, built around the needs of millions of people, and yet it a
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Two dogsA man has two dogs: a hound and a housedog. He trains the hound to help him hurt and teaches the housedog to watch the house. When he returns home after a day's hunt, he always gives the house-dog some meat. The hound feels very angry. He say
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