Opals
n. 蛋白石, 猫眼石, 乳色玻璃（ opal的复数形式 ）
🗣️ 情景例句
Now we can really start the party!
现在我们可以真正开始舞会了！
If we are bound to forgive an enemy,we are not bound to trust him.
即便我们决心宽恕敌人，也决不能相信敌人。
so every so often a sample is obtained with a coring bit.
因此时常要用取芯钻头取样。