Trying to track everything is wasteful, especially if the lion's share of profits comes from lines that make up a minority of overall production.
试图跟踪所有的信息是很浪费的，尤其当最多的利润来自小部分产品时。
2
The silicon production is absolutely non wasteful.
硅的生产是绝对不会亏本的！
3
Lijiagou mine severely damaged by unauthorized and wasteful mining, Mining-out area large stope collapse frequently, great impact on mine production and safety.