Alkynes
[化] 炔烃
🗣️ 情景例句
I was when I first came to the United States.
当我刚到美国来的时候是感到有点紧张。
I hope you can see me.
我希望你能看望我。
At this time, the man downstairs was trying to sleep.
这时楼下人正试图入睡。