1. 释放，放出，发出（气体、热量、气味等）
If something gives off or gives out a gas, heat, or a smell, it produces it and sends it out into the air.

1. have as a by-product

e.g. The big cities gave off so many wonderful American qualities

2. give off, send forth, or discharge
as of light, heat, or radiation, vapor, etc.

e.g. The ozone layer blocks some harmful rays which the sun emits

Synonym: emitgive out