"Cut vegetables carefully" 可以用英文表达为 "handle vegetables with care" 或 "be careful when cutting vegetables".

这个短语的来源可能源于日常生活中对于蔬菜的操作，为了保证蔬菜的完整性和新鲜度，人们会在切蔬菜时小心翼翼地进行操作。

例句：

Please handle the tomatoes with care, we don't want to squish them.
Be careful when cutting the onions, they can make you cry.
Remember to handle the lettuce gently, or it will wilt quickly.

中文翻译：

请小心切西红柿，我们不想把它们弄烂。
切洋葱时要小心，它们会让你流泪。
记得轻柔地处理生菜，否则它会很快凋萎。