Of course, they must be careful not to let it take up too much of their time because study is still their primary responsibility.

当然，他们也必须小心，不要让打工占据太多时间，因为学业仍然是青少年首要的责任。

youdao

Of course, they must be careful not to let it take up too much of their time because study is still their primary responsibility.

当然，他们必须小心，不要让它占用太多的时间，因为学习仍然是他们的首要责任。

youdao

In summary, historians must be careful about the kind of conflict they emphasize in eighteenth-century America.

总之，历史学家必须谨慎对待他们所强调的18世纪美国的冲突类型。

youdao

But they must be careful not to get too close.

VOA: special.2009.04.15

Surgeons must be very careful When they take the knife!

VOA: special.2010.07.18

That in turn means they must be careful in what they do and say in this political cycle.

ECONOMIST: Can Democrats and Republicans ever work together again?

It means that both the PPP and, especially, the other main party, the Pakistan Muslim League (N), led by Nawaz Sharif, have a bank of religious-minded voters whom they must be careful not to offend.

ECONOMIST: Pakistan's increasing radicalisation

"Parliament will discuss tomorrow the new process of choosing the 100-Egyptians who will write the country's most important guide to governance so they must be careful in their choices and it must include constitutional lawyers and experts this time around, " Ashour told CNN.

CNN: Court disbands Egypt's constitutional group