The efficiency of the machines has been more than trebled.译文：这些机器的效率已经提高了（）倍多。（请大家填写数字即可。）

答案大类：中国大学MOOC慕课小类:中国大学MOOC慕课未分类 2022-01-12 02:06:43

The efficiency of the machines has been more than trebled.译文：这些机器的效率已经提高了（）倍多。（请大家填写数字即可。）XoB傲朋学习网

正确答案：2XoB傲朋学习网

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