单词:system residence area
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Unit 108:Get into the swim 第108单元:游泳去 One of the best all-around exercises,swimming increases both cardiovascular and muscle strength. 游泳能促进心血管及肌肉的耐力,是最佳的全身运动之一。 There is hardly any
Exercise 1-58: Creating Word Groups Break the paragraph into natural word groups. Mark every place where you think a pause is needed with a slash. Pause the CD to do your marking. Exercise 1-59: Practicing Word Groups When I read the paragraph this t
Editor's note: See An Introduction to Verb Tenses for the first story in this series. For VOA Learning English, this is Everyday Grammar. This is the last in our four-part series on verb tenses. Make sure you see our episodes on progressive and perfe
Are You Progressing with Progressive Tenses? Editors note: This is the second of a four-part series on verb tenses. Click here to see part one. For VOA Learning English, this is Everyday Grammar. Today we are going to look at the progressive verb ten
And, says Haskell, the prospect5 of having to gasp6 and strain their way to better health at a 70-80 percent target range has kept a lot of people from trying. 哈斯卡尔说,“一想到要达到必
If you don't exercise regularly(有规律的), a sudden bout of energetic activity can trigger a heart attack, and may even kill you, according to a new study published in JAMA, the journal of the American Medical Association. It sounds like the