find currency among

例句：

1. 1. I found the key under the couch.
   我在沙发下找到了钥匙。
2. 2. The scientist discovered a new species of plant.
   科学家发现了一种新的植物物种。
3. 3. She ascertained that the information was accurate.
   她确认了信息的准确性。