In arid regions, the water tables remain at a constant level far below the surface, preventing stream-beds from filling up even during wet years.后半句表示防止河床被充满还是不被充满？
...o buy some.A. made up for B.
run out of C. kept away from D. got down to3. Feeling fearful
is healthy ________ it helps you slow down and evaluate risks properly.A. because B.
until C. before D. although4. Mar...
有人说“太阳从东方升起，从西方落下”翻译成英语应是：The sun rises in the east and sets in the west. 不能是：The sun rises from the east and sets from the west.请问，这里为什么不用 from the east 而用 in the east 呢？谢谢解答！
...This Summer I determinedly made a decision of learning swimming, but up to now, I only went to swimming pool for twice.(for是介词，twice是副词) 这个夏天我坚定地下了学游泳的决心。但到现在为止，我仅去过游泳池两次。4. It not only has bigger muscles but, in tests...
For males under forty，ten seconds is the typical reaction time；young men can demonstrate full erection in from 3 to 5 seconds of sexual stimulation.The reaction time is doubled or tripled for men in their fifties and above.刘老师，这里的 in from 如何去理解 in 这个词？
Here
is a rather far-fetched description of a person starting from the head down上文的背景是介绍复合形容词，下文是用复合形容词从头往下描述一个人。 想了解这里down是用法是什么，能看懂这里的意思是：从头往下进行描述。但...
...ound , and one of them got hurt.The children were
beginning to straggle in from the playground.Children should not
be left unattended in the playground.A large number of
children were running around in the playground.Billy ran over to
the playground.Ashley was put on the
playground duty.(不是我...
(1)在新概念三看到一句话， Where had it come from ? 换成现在普通句就是 It have come from america. 能否说我自己是 I have come from china. 我理解现在完成时是已经完成的， 所以我感觉I have come from china.很正...