3PHRASE 十分緊張;非常害怕;嚇得發抖 If you are quaking in your boots or quaking in your shoes, you feel very nervous or afraid, and may be feeling slightly weak as a result. 十分緊張;非常害怕;嚇得發抖
If you stand up straight you'll give an impression of self-confidence even if you're quaking in your boots.