We must keep up with the advanced countries.
我们一定要赶上先进国家。
We must keep up the pressure to get prevention, treatment and care linked and working.
我们必须不断施加压力，使预防、治疗和护理互相联系并发挥作用。
We must pick up rubbish and keep our city clean.
我们必须捡起垃圾，保持城市清洁。
We must study hard to keep up with The Times.
我们一定要努力学习，以赶上时代的步伐。
We must double our efforts to catch / keep up with the developed countries.
我们必须加倍努力以赶上发达国家。 。
We must keep the documents locked up.
我们一定要把文件锁好。
In order to catch up with the advanced countries, we must keep learning.
为了赶上发达国家，我们必须一直学习。
We must keep our guard up because it is a delicate game and we must be ready.
我们必须保持警惕，因为这比赛很棘手，我们必须准备充分。
We must study harder to keep up with him.
我们要赶上他必须更加努力地学习。
We must keep learning to keep up with the changing.
不断地学习以跟上变化的形势。
We must keep learning to keep up with the changing.
不断地学习以跟上变化的形势。
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