Hexadiyne
[化] 己二炔
🗣️ 情景例句
A credit card is very useful when you go traveling.
当然旅游的时候，信用卡很有用。
Could you tell me where is the elevator?
你能不能告诉我电梯在哪里？
She serves as an impressive reminder of the great ships of past.
它给人们留下深刻的印象，使人们回忆起历史上的巨型帆船，