With business booming,keeping up had become a struggle – she felt she had to run really fast,to just
题目
With business booming,keeping up had become a struggle – she felt she had to run really fast,to just to stay in place.怎么翻译?
答案
随着生意起步,维持局面已经开始困难--她觉得为了站得住脚,自己必须努力工作.
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已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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