1. Bruce charged at it, but in the middle, the car came to a grinding halt.
    布鲁斯向水塘冲去，但车开到水塘当中，嘎吱一声停住了。

2. For they came and went with such frequency that I never even got a chance to learn their names.
    因为他们来匆匆，所以我甚至都没有机会知道他们的姓名。

3. What´s the frequency of this broadcast?
    这广播的频率是多少?

4. When I went to senior middle school, I was eager to continue studying English; however, my experience in senior school was very different from before.
    到了高中后，我渴望继续学习英语，然而高中时的经历与以前大不相同。

5. The current is strongest in the middle of the river.
    河中心的水流最急.

6. This depends on the precise radio- frequency of the 21- cm wavelength, or 1420 megacycles per second .
    这种方法依靠21厘米波长或每秒1420兆周的精确无线电频率。

7. There is a table in the middle of the room.
    房间的中央有一张桌子.

8. There is a table in the middle of the room.
    屋子中间有一张桌子.

9. This depends on the precise radio- frequency of the 21- cm wavelength, or 1420 megacycles per second .
    这种方法依靠21厘米波长或每秒1420兆周的精确无线电频率。

10. This depends on the precise radio frequency of the 21-cm wavelength, or 1420 megacycles per second.
    这种通迅联系要靠21厘料波段，即每秒1420兆周的精确无线电频率。

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