Caoutch(ouc)ene
[化] 生胶干馏渣(生胶干馏所得的高沸点产物)
🗣️ 情景例句
You have been working on this for some time, Richard.
你从事这工作已有一段时间了， Richard。
I enjoy my work too much, that it doesn't even seem like work.
由于我太以工作为乐了，所以不觉得是在工作。
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。