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).