🧩 词语组成解析
云杉属
🗣️ 情景例句
Thank you, Somsak.
谢谢你， Somsak。
Rowing builds up arm muscles.
划船能够锻炼臂力。
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。