betterment works的用法和樣例：
例句
- Improvement works to a river which discharges into a coastal protection area.
在一條排放入海濱保護區的河流進(jìn)行改善工程。 - On September 28, 1997, improvement works were completed and the seminar rooms were converted into multi-activities rooms.
會(huì )議室于一九九七年九月二十八日完成改善工程后，已改為多種活動(dòng)室，用以舉辦各類(lèi)藝術(shù)活動(dòng)。
