You will be able to catch up on overdue paper work.
你能完成早该完成的文书工作。
He won't be able to catch up with us unless he runs faster.
他不可能赶上我们,除非他跑得更快一些。
I study hard, I will be able to catch up with my classmates.
如果我努力学习,我就能赶上别的同学。
So U.S. will never be able to catch up.
所以美国就别想赶上中国了。
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