Number the pages of your exercise book.
把你的练习本编上页码。
For this exercise, however, there's only one sheet, so using its number is simpler.
但是对于本练习来说，工作簿中只有一个工作表，以便使用它的编号更简单。
Physical exercise also increases the number of newborn neurons.
体育锻炼也可以增加新生神经元的数目。
In this exercise you have to factorize a given number.
在此练习中您要对一个给定的数字作因数分解。
I think I have such a good number because I did a lot of exercise during my life.
我觉得，我的数字这么好是因为我一辈子都积极锻炼。
Then he write a number in his exercise-book and put up his hand.
然后他在练习本上写下一个数字并举起手。
Since this is just an exercise, we'll restart number two once we get to 4,000.
由于这只是一个练习，一旦我们到达4000ft，我们将重新启动第二引擎。
Since this is just an exercise, we'll restart number two once we get to 4,000.
由于这只是一个练习，一旦我们到达4000ft，我们将重新启动第二引擎。
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