fast color,fast colours是什么意思

用法例句

It was discovered that DNA had significant hyperchromic effect to the colored complex of naphthol with fast blue salt.

发现ＤＮＡ对萘酚与坚牢蓝盐的显色具有明显的增色效应。

Food Black 1)and Fast Yellow SX(CI.

Food Black 1)和坚牢黄(CI。