Heptanone
n. [化]庚酮
🗣️ 情景例句
But you may rest assured that the payment is guaranteed.
但是你尽可以放心，我们的付款是有保障的。
I hope to see you again.
希望能再见到您
but rarely with bicycles made for two.
不过双人自行车则不容易看到。