Pentone
缬烯炔, 异戊烯炔
🗣️ 情景例句
How do you do?
你好！
Sometimes the snow was so deep we could tunnel through it.
偶尔雪会积到可以造隧道那般的深度。
He had known that it was not safe to travel alone in the forest near the coast.
也听说过独自一人在海边的森林里走是不安全的。