Laxite
机械碎屑岩
🗣️ 情景例句
I am in the 7th grade.
我是七年级。
Nothing so necessary for travellers as languages.
旅行者最需要的是几种语言。
What is needed in the case of noise is a study of large numbers of people living under noisy conditions,
对于噪音问题，需要对大量生活在噪音中的人进行研究，