Pentylene
戊二 烯
🗣️ 情景例句
The plight of starving people is too awful to think about.
饥民的苦境糟得不可想象。
This kind of article is often bought as a gift, so exquisite and tasteful design is of prime importance.
人们购买这种商品通常用来赠亲友，所以精美高雅的设计至关重要。
Visitors have been asked to keep the woods clean and tidy.
游客已被告知要保持树林的整洁。