industrial betterment v的用法和樣例：
例句
- The betterment of the word can be accomplished through pure and goodly deeds, through commendable and seemly conduct.
通過純潔和良好的行為以及值得讚揚和適當的品行才能達到世界的改進。 - This paper reports an improvement on the experiment of refining industrial natrium sulfide recorded in some chemistry textboobs.
本文對一些化學實驗教科書所載提純工業硫化鈉的實驗方法進行了改進。
