Ethynes
[化] 炔烃
🗣️ 情景例句
It is not as difficult as it looks.
这并不像看起来那丢难。
One usually pricks up one's ears when his name is called.
人在被叫到自己的名字时，通常要侧耳倾听。
and a very firm hand must be employed in the early stages.
因此开始阶段需要有一位强有力的老手。