reference book of exercises
reference book of exercises
练习本
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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If everybody wants to widen he makes the ability of exercises, can choose more a few, the exercises at the back of all reference book is done.
如果大家想拓宽自己做习题的能力，可以多选择一些，所有参考书后面的习题都做一下。
youdao
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