1. The policeman would not let go his grip on the thief.
    警察紧紧地抓住那个窃贼不放。

2. The eagle seized its prey in a tenacious grip.
    鹰将捕获物紧紧抓住.

3. The old undue grip relaxes and the process of recuperation and repair begins.
    原先不适当的紧张就会松弛下来，恢复和修整的过程就会开始。