Synfuels
(synfuel 的复数) n.合成燃料
🗣️ 情景例句
Yes, it is. Come up.
是的 是我。请上来
Don't forget to put stamps on the letter before you mail it.
不要忘记在寄信以前把邮票贴在信封上。
To make matters worse, the room is rather small, so I have temporarily put my books on the floor.
更糟糕的是房间还非常小，所以我暂时把书放在了地板上。