Ethylethylene
丁烯-1
🗣️ 情景例句
Did you go home?
你回家了吗？
We are delighted with your products and are thinking of placing an order. The size of our order will depend greatly on your price.
我们对你方的产品非常满意，正欲订购。我们定单的大小主要取决于你方的价格。
'You see.I've forgotten my key.'
“您瞧，我忘带钥匙了。”