Aerase
需氧菌呼吸酶
🗣️ 情景例句
I've got it.
我都记下了。
I wondered if you could buy me some pencils?
我不知道你是否能替我买铅笔？
What was the population of the more developed countries in 1950?
1950年较发达国家的人口是多少？