Pentone
缬烯炔, 异戊烯炔
🗣️ 情景例句
Use your head.
动动你的大脑。
What is wealth good for,If it brings melancholy?
财富如带忧郁来，有了财富有何用？
Aunt Harriet lived in that leisurely age when servants were employed to do housework.
哈丽特生活在一个悠闲的年代，家务事都由雇来的佣人代劳。