Undervulcanization
欠硫化
🗣️ 情景例句
I look silly! It is too small!
我看来很滑稽 ，它太小了！
Can I fix an overseas call to London by person-to-person call?
我要打到伦敦的叫人电话好吗？
OK. Listen, that's the bell.
好的。听，铃响了。