Heptanal
[化] 庚醛
🗣️ 情景例句
I heard that some tours actually go down into the canyon. Is that true?
我听说有的旅游团真正下到峡谷里去了。那是真的吗？
I know the boy whose father is a merchant.
我知道那个男孩的父亲是商人。
We're warm, we're dry and we're safe.
“我们不感到冷，身上是干的，而且我们很安全。