Dichloroazodicarbonamide
二氯偶氮脒
🗣️ 情景例句
for reading to the kids in the hospital.
为住院的孩子朗读。
She began playing the violin when she was nine.
她从九岁就开始练习小提琴。
when a significant number of people are living permanently in space.
如果有相当数量的人永久性地住在太空，