1. 保住，守住（有利因素）
If you hold on to something that gives you an advantage, you succeed in keeping it for yourself, and prevent it from being taken away or given to someone else.

2. （过长时间地）保存，保留
If you hold on to something, you keep it for a longer time than would normally be expected.

3. 坚持（信仰、信念、原则等）
If you hold on to your beliefs, ideas, or principles, you continue to believe in them and do not change or abandon them if others try to influence you or if circumstances cause you to doubt them.