Efforescence
渗斑; 泛碱
🗣️ 情景例句
Come over to my place at you convenience.
方便时请来我处。
Did you go to the store yesterday?
你昨天去商店了吗？
We can offer a 10% discount for orders over 10000 pieces.
订购一万个以上，我们可以打九折。