Streptolysin
[机] 链球菌溶血素
🗣️ 情景例句
Glad to know you.
很高兴认识你。
Contact me by telephone.
电话跟我联络。
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。