1. The continuation of biological rhythms in an organism without external cues attests to its having an internal clock. 在没有外部提示的情况下，生物体中生物节律依然能够延续，这能证明它体内有一个时钟。
2. Hiss success attests to his ability. 他的成功证实了他的能力。
3. The boy's good health attests his mother's care. 这个男孩的良好健康是他母亲悉心照料的明证。
4. The boy's good health attests to his mother's care. 这个男孩的良好健康就是他母亲细心照顾的明证。
5. He is not quite the man he thinks he is, "Felton attests." “他是不太男子，他认为他是”费尔顿证明。
