Ethylethylene
丁烯-1
🗣️ 情景例句
I cannot forgive myself for not seeing my mother when she was sick in bed.
母亲病的时候我没能去看她，为这件事我永远不能原谅我自己。
The dinner was superb. Who cooked it?
菜太棒了！谁做的？你吗？
together with a note which said: 'A thief, yes, but only 50 per cent a thief!'
“一个小偷，是的，但只是一个50%的小偷！”