We must be mindful of the consequences of selfishness.

我们一定要留意自私自利的后果。

《柯林斯英汉双解大词典》

However, you must be mindful not to use your words to gossip or complain.

不过你得小心用词用语，别去八卦或抱怨。

youdao

Even people in developed countries, however, must be mindful that ACTS of sabotage are possible.

然而，即使是发达国家的人们，也必须保持警惕，在他们国家也可能发生破坏行为。

youdao

EU, Mr Persson must be mindful of the constraints of public opinion at home.

ECONOMIST: Charlemagne

Gaza and Guantanamo both demonstrate that governments must be mindful of how their actions factor into public information campaigns both for and against them.

CENTERFORSECURITYPOLICY: Gaza, Guantanamo and the media battlefield

Gaza and Guantanamo both demonstrate that governments must be mindful of how their actions factor into public information campaigns -- both for and against them.

CENTERFORSECURITYPOLICY: Gaza, Guantanamo and the media battlefield