level vessel

例句：

1. 1. The level of the river has been rising steadily for the past few years.
   过去几年里，这条河流的水平一直在稳步上升。
2. 2. The company's stock price is at a historical low level.
   该公司的股票价格处于历史低点。
3. 3. The team needs to improve their performance level in order to compete effectively.
   为了有效竞争，团队需要提高其表现水平。