Careful contrast of the two plans shows some important differences. 把两个计划仔细地加以对比就可看出一些重要的差异。Be careful not to damage other people's property. 小心别损及别人的财物。
They don't last long no matter how careful you are. 不管你如何仔细，他们都维持不了很久。Be careful with that ─ it cost a lot of money.小心别弄坏那东西，它可值钱了。
Careful consideration should be given to issues of health and safety. 健康与安全的问题应该认真予以考虑。