Hydroxytropone
酚酮
🗣️ 情景例句
Fortunately, they returned safely.
说来幸运，他们平安回家了。
The first step is the only difficulty.
万事起头难。
Because Manhattan Island is made of solid rock, it is safe to build very tall buildings.
曼合顿岛是由坚固的岩石构成的，这使得兴建大厦非常安全。