妈妈工作很辛苦。
这只鸟妈妈一定很辛苦地寻找所有的毛，然后用它们搭成了这样漂亮的一个圆形鸟巢。
The old bird must have worked hard to find all the hairs, and make them into such a pretty, round nest.
可妈妈知道我平时学习很辛苦，好不容易才盼来了一个国兴节，她不忍心破坏我的快乐。
Mom knew that I normally can be very difficult to learn, finally, a country which was looked forward section, and she could not bear to destroy my happiness.
是妈妈自己一个人花了差不多一年半时间又点又绣很辛苦完成的。
His mother is a flower for almost a year and half time and embroider is hard.
妈妈：因为钱不会长在树上嘛（喻挣钱是很辛苦的）。
妈妈：因为钱不会长在树上嘛（喻挣钱是很辛苦的）。
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