give off和give out的区别

以下是柯林斯高级英语学习词典的解释，可以看出一些问题：
一、give off
If something gives off or gives out a gas, heat, or a smell, it produces it and sends it out into the air. 【意思是give off可表示释放气体、热或者气味】

二、give out
1 [PHRASAL VERB] V P n (not pron), also V n P
If you give out a number of things, you distribute them among a group of people. 【意思是分发、发放】
There were people at the entrance giving out leaflets.
= hand out
2 [PHRASAL VERB] V P n (not pron), V n P
If you give out information, you make it known to people. 【意思是透露（信息）】
He wouldn't give out any information...
How often do you give your phone number out?
3 [PHRASAL VERB] V P, V P
If a piece of equipment or part of the body gives out, it stops working.【意思是（设备的一部分）停止工作】
All machines give out eventually...
One of his lungs gave out entirely.
4
see give off【同"give off"】

从以上的解释可以看出，give out的涵义多于give off，所以give off任何时候都可以用give out替代，但反过来则不行。