Be careful of the nettles—they sting!

小心给荨麻扎着—荨麻有刺！

《牛津词典》

They had to be careful of floating chunks of ice.

他们不得不小心漂浮着的厚冰块。

《柯林斯英汉双解大词典》

Be careful of fallen power lines.

小心倒下的电线。

youdao

For example, read copies of a group's financial records and be careful of groups with names that sound like well-known charities.

VOA: special.2009.11.02

I love chemistry now. Be very careful what you say. Have any of you made that statement about hating a subject?

我现在很喜欢化学,所以你们说话的时候,可要小心咯？

麻省理工公开课 - 化学原理课程节选

So it's a way of reminding you, I've got to be careful about the types of things that I put in.

因此我这是在提醒你，一定要对输入的东西的类型,多加注意。

麻省理工公开课 - 计算机科学及编程导论课程节选

The watchword here is be careful of bonds with high yields and scant information.

FORBES: Buffett Frets Over Municipals, So Should You

How we accept data from publishers will be something to be careful of going forward.

WSJ: Managing in Asia: InMobi Aims to Add Value; Atul Satija

Be careful of investing in companies that have substantial retiree obligations and declining businesses.

FORBES: Not a Picturesque Kodak Moment