Degradinite
显微硬质煤组分
🗣️ 情景例句
Sorry, but she is out for lunch right now.
抱歉，她现在出去吃午饭了。
It is good to have friends in trouble.
在患难时得到朋友是幸运的。
What are you going to give our art teacher for Teachers' Day?
教师节你打算送什么礼物给我们的美术老师？