| Ultraviolet ray |
紫外線 |
| Umeboshi |
日本梅干 |
| umeboshi / Japanese salt plums / salt plums / fermented plums |
日本梅干 |
| unconfined groundwater |
自由地下水 |
| Under-forest economy |
林下經濟 |
| underbrush; understory; underwood; undergrowth |
下木 |
| underground cutoff wall |
地下截水牆 |
| underground water drainage works |
地下排水工程 |
| understory management |
下木栽植 |
| understory management |
林下栽種 |
| understory management |
樹下栽植 |
| understory plants |
下層林木 |
| understory; underwood; undergrowth |
下層林 |
| understory; underwood; undergrowth |
下層植生 |
| Underwater acoustics |
水聲學 |
| Underwater biology |
水中生物學 |
| Underwater television |
水下電視 |
| uniform distribution |
均勻分布 |
| uniform flow |
等速流 |
| uniform shelterwood system |
大面積傘伐作業 |
