He was careful to keep out of sight.

他小心翼翼地躲开别人的视线。

《牛津词典》

They were careful to observe the proprieties.

他们恪守规矩。

《牛津词典》

I'm careful to start out by saying clearly what I want.

我小心地以清楚地说出自己想要的东西开始。

《柯林斯英汉双解大词典》

She nodded her head as she touched and smelled the flowers that her father had been so careful to avoid.

VOA: special.2009.05.23

I'm going to go there initially, so I can move this over here, so I can get the base part of that over there, I want to put that one there before I put this over here, finally I get to the point where I can move the bottom one over now I've got to be really careful to make sure that I don't cover up the bottom one in the wrong way before I get to the stage where I wish they were posts and there you go.

我要先把其他的放到多余的柱子上，然后把最底下的放到目标柱子上，我要在把除了最底下的圆盘，其他的圆盘挪过来之前,把最下面的圆盘放在这儿,因此我得出了最下面的盘子,应该如何摆放的结论,当我没得到其他盘子的正确摆放位置的时候,要很小心的确认没把错误的盘子,放在最下面的盘子上面。

麻省理工公开课 - 计算机科学及编程导论课程节选

Even when the president first came into the office he is always careful to make sure he was always well briefed, meet regularly with his national security team, with his intelligence briefers, on a regular basis.

即使是总统从一开始,走进办公室,他总会很小心地确保,他有个良好的情况简介，和他的安全小组见面，和情报简报员见面，这些都是定期的。

普林斯顿公开课 - 国际座谈会课程节选

Nature, which the Lao government has been careful to protect, seems to be enough on its own.

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"We're careful to not say to people, 'Come out immediately' -- that's not realistic, " Kraft said.

CNN: Coming out late in life complex but not unusual

And now in 2008, both Democrats are careful to voice support for the Second Amendment.

CNN: 'Bittergate' sparks new look at candidates and guns