assert

The lawyer continued to assert his client's innocence despite the new evidence.

(Chinese) 尽管有了新证据，律师仍继续坚称其委托人是无辜的。

It is important to assert your rights if you feel you are being treated unfairly.

(Chinese) 如果你觉得受到了不公平对待，维护自己的权利是很重要的。