没有发射的意思。

发出（光等）；长出（枝、杈等）give off通常表示“发出（光、气味、声音等）”，后接的宾语一般位于off之后。When bacteria stagnate they multiply and give off toxins and stinky odors .当细菌停滞时，它们会繁殖并释放毒素和臭气。Isotopes which give off rays are known as radioisotopes .出射线的同位素被称为放射性同位素。In a similar way you were created to hold a fire which enables you to give off warmth and light .同样的，你的诞生也是为了能生出一团火，让自己发出光与热。