We must protect them.

我们必须保护他们。

youdao

Animals are our good friends, we must protect them.

动物是我们的好朋友，我们必须要保护它们。

youdao

This kind of bird is dying out, and we must protect them.

这种鸟类已经正在灭绝，我们应该保护他们。

youdao

We must protect them from violence, whatever its nature.

VOA: standard.2009.06.15

We owe our troops prayerful, considered decisions about when and where we commit them to battle to protect our security and freedom, and we must fully support them when they are deployed.

WHITEHOUSE: Weekly Address: Veterans Day and Fort Hood

And as a Nation, we reaffirm a most sacred obligation: that we must never forget the men and women who did not come home, and that we must never stop trying to return them to their families and the country they fought to protect.

WHITEHOUSE: The White House