Alexandrite
n. 变色宝石, 紫翠玉\\n[化] 翠绿宝石; 变石
🗣️ 情景例句
Smoking is harmful to your health.
吸烟有害健康。
Think much, speak little, and write less.
勤思考，寡发言，少落笔。
easily obtainable from the lunar rocks in the form of liquid oxygen.
从月球上的岩石中很容易提炼出液态氧，