digress
英 [daɪ'gres]
美[daɪ'ɡrɛs]
	    - vi. 离题;走向岔道
 
英英释意
- 1. lose clarity or turn aside especially from the main subject of attention or course of argument in writing, thinking, or speaking;
 - "She always digresses when telling a story"
 - "her mind wanders"
 - "Don't digress when you give a lecture"
 
- 2. wander from a direct or straight course