Estrone
n. 雌激素酮\\n[化] 雌酮
🗣️ 情景例句
No one knows for certain what happened, but it's a fair bet that it was not an accident.
没有人知道究竟发生了什么，但几乎可以肯定这并非意外。
Sail while the wind blows; wind and tide wait for no man.
驶船要乘风，风潮不等人。
I looked at the map and then at the millimeter.
我看了看地图，又查了一下里程表。