Calcein
钙黄绿素
🗣️ 情景例句
There is still a week to go before the vacation begins.
现在距离假期还有一星期。
Gifts from enemies are dangerous.
敌人礼，藏危险。
When you think of the innumerable birds that one sees flying bout,
你可以想象出天上有看得见的飞来飞去、数不清的鸟，