annual-benefit
| function
| annual benefit | |
| hydroel.st. | 年效益 |
| function | |
| gen. | 运行; 工作 |
| hydroel.st. | 作用 |
| interntl.trade. | 效用; 职能 |
| light. | 功能，用途 |
| math. | 运算 |
| met. | 功用; 用途 |
| |||
| 年效益 | |||
|
annual-benefit : 3 phrases in 3 subjects |
| Earth sciences | 1 |
| Economics | 1 |
| Technology | 1 |