"意识到" 的英文表达是 "realize"。这个词来源于拉丁文的 "realis"，意思是 "真实的" 或 "实际的"。它用来指人们在思考或看到事物时，意识到这些事物的真实状态或情况。例句：

I realized that I had made a mistake in my calculation. 我意识到我在计算中犯了一个错误。

She finally realized that she was in love with him. 她终于意识到自己爱上了他。

It took him a long time to realize the full extent of his illness. 他花了很长时间才意识到他的疾病的全部严重性。