Pentone
缬烯炔, 异戊烯炔
🗣️ 情景例句
For payment we would prefer and L/C.
我们更愿意使用信用证的方式付款。
Have you taken a bus?
你坐过汽车吗？
They sting or bite without provocation; they fly uninvited into our rooms on summer nights, or beat ageist our lighted windows.
它们无缘无故地又叮又咬；夏天的晚上，它们未经邀请便飞到我们房间里，或者对着露出亮光的窗户乱扑乱撞。