1. Except for today, prices range from $6 for a dozen short-stems to $19 for a dozen of its longest stems.
    除非是当天的玫瑰，否则玫瑰的价格在短茎每打6美元和最长茎每打19美元之间。

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. The general arts course at the university encompasses a wide range of subjects.
    大学文科包括的科目范围很广.

5. 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。

6. The farm breeds a wide range of poultry.
    这个农场饲养各种家禽。

7. 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。

8. 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。

9. The journalists also get a chance to shoot a gun on the practice range; none of it seems that difficult, and we put most of the bullets somewhere on the target.
    记者们也有机会在练习场射击。射击似乎并不难，我们的子弹几乎都打到靶上了。

10. The lights on the range are dimmed and we are stood in front of a large screen.
    场上的灯暗了下去，我们面对一块大屏幕站着，

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