Brassin
[机] 芸苔素
🗣️ 情景例句
Was it serious?
病得很重吗？
Don't forget to look after him.
不要忘记照料他。
Once the oxygen content of the air had risen to 25% it was ready to burn.
一旦氧气在空气中的含量达到25%，它就要燃烧。