After missing a term through illness he had to work hard to catch up with the others.
他因病休学一学期，不得不努力学习好赶上别的同学。
Vera missed three weeks of school she must work hard to catch up with the class.
维拉有三个星期没上学，所以她得加紧用功，赶上班上的其他同学。
After missing a term through illness, he had to work hard to catch up with the others.
他因病休学了一个学期，他不可不努力学习赶上别的同学。（动作）
After missing a term throughillness Carol had to work hard to catch up with the others.
因病耽误了一学期的功课后，卡罗尔不得不努力学习以便赶上班里其他同学。
Having missed a whole semester, you have to work hard to catch up with the rest of class.
还是这个好吧。缺席了一学期，不就是缺了一学期的课了么！
All of these companies have to work hard to keep their lead, but it is nearly impossible for new entrants to catch up.
他们要竭尽全力地吸引住他们的用户，(这样的用户规模)对于那些新加入的公司，是难以望其项背的。
It calls for hard work by several and even a dozen generations of China for it to catch up with developed countries.
中国要赶上发达国家，还需要几代人、十几代人的艰辛努力。
However, I am not good at studying, so he not only helps me with my homework about every subject but also tells me to work hard in order that I can catch up with others as soon as possible.
然而，我不善于学习，所以他不仅帮助我做我的家庭作业，但也告诉我要努力工作，以便我能尽快赶上别人。
If you live in NY, you live as if you are always behind time. You walk fast, you work hard, just to catch up with time.
如果你生活在纽约，你的生活方式就好象你处处都落后于时间，你非得加快脚步，努力工作，仿佛永远也赶不上时间。
There needs to be a lot of hard work in order to catch up with and overtake him!
假如我想追上甚至超越他，还有很多很辛苦的工作要做！
Inspired by what the great scientist said, he made up his mind to work hard and catch up.
由于受到这位伟大的科学家讲话的鼓舞，他决心努力工作赶上去。
Inspired by what the great scientist said, he made up his mind to work hard and catch up.
由于受到这位伟大的科学家讲话的鼓舞，他决心努力工作赶上去。
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