Estergum
松酯胶, 酯树胶
🗣️ 情景例句
He was my roommate in college.
他是我大学时的室友。
None of my socks match.
我的袜子都缺少一只。
He had no sooner returned than he bought a house and went to live there.
他刚一回到英国便买下了一幢房子住了进去。