Ethynes
[化] 炔烃
🗣️ 情景例句
The whole Stewart family is close. Stewart
全家人相处得很好。
I hope that I can make a worthwhile contribution to the efforts of this group.
我希望能对这个团体努力的成果提供有价值的贡献。
He hired a workman to repair the fence.
他雇用了一个工人修理围墙。