workable
adj
1 that will work2(3); practicable or feasible 行得通的; 切合实际的; 可行的
a workable compromise, plan, scheme 行得通的折衷办法、 计画、 方案.
2 that can be or is worth working (work2 5) 值得经营的
The silver mine is no longer workable, eg because it is flooded or because the ore is exhausted. 这个银矿不值得开采了(如因积水或矿石储量将尽).
As the Maori had no written language, the stories of Maori history were handed down from generation to generation.
由于毛利人当时没有书面语,毛利人的历史故事是一代一代传下来的。
I am sorry that you have a disagreement with your father. Personally, I think it is important to follow your interests and your abilities, and it sounds as though you have plenty of both of these already.