Hevein
[化] 橡膠蛋白
??? 情景例句
I'm not getting on very fast with this job.
我這份工作進展不快。
Can I be sure of a profit if I invest?
我要是投資，肯定能獲利嗎？
Debbie is only eleven years old and she hopes to set up a new world record.
黛比只有11歲，她希望創一項新的世界紀錄。