Delcid
氢氧化铝, 氢氧化镁的混合物
🗣️ 情景例句
How long does it take?
要花多久时间？
Pardon me.
请原谅。
In man's early days, competition with other creatures must have been critical.
在人类早期，人类与其他生物的竞争一定是必不可少的。