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| 21. | Between the columns were light, hollow panel walls of double brick. |
| 柱间是两砖厚的轻质空心节间墙。 |
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| 22. | a long double-edged knife used for amputations. |
| 在切断手术中用的两刃长刀。 |
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| 23. | Tapping the pen twice is equivalent to double-clicking a mouse. |
| 轻击两下笔，这相当于双击了鼠标。 |
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| 24. | He took double of what the other children did. |
| 他所拿的两倍于其他小孩。 |
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| 25. | so without the trailing f it will give you an error telling you that you must use a cast to convert double |
| 编译器通常会将指数作为双精度数（double）处理，所以假如没有这个尾随的f，就会收到一条出错提示，告诉我们须用一个“造型”将double转换成float。 |
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| 26. | This uses the static method random( ) in the Math library, which generates a double value between 0 and |
| 该方法的作用是产生0和1之间（包括0，但不包括1）的一个double值。 |
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| 27. | Upper or lowercase L means long, upper or lowercase F means float and upper or lowercase D means double |
| 若为大写或小写的L，代表long； 大写或小写的F，代表float； 大写或小写的D，则代表double。 |
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| 28. | 24 [和合]在这二十块板底下，又作四十个带卯的银座，两卯接这块板上的两榫，两卯接那块板上的两榫。 |
| NIV] and made forty silver bases to go under them-two bases for each frame, one under each projection. |
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| 29. | So the answer is that casting from a float or double to an integral value always truncates. |
| 所以答案就是：将一个float或double值造型成整数值后，总是将小数部分“砍掉”，不作任何进位处理。 |
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| 30. | Losing irrigation water may mean either abandoning land or less double cropping. |
| 灌溉用水短缺的直接影响不是废弃农田，就是减少一年两作。 |
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