Calcein
钙黄绿素
🗣️ 情景例句
It's tough getting an O.K. from the boss.
很难从老板那听到声“同意”。
Love is sweet in the beginning but sour in the ending.
爱情始甜而终苦。
The mobile phone is as popular as the beeper nowadays.
现在手机和寻呼机一样普及。