生还者身上有冻伤。The survivors suffered from frostbite.他被冻伤了，而且出现了休克，但是据说情况稳定。He was suffering from exposure and shock but his condition was said to be stable.有两个登山者冻伤了.Two of the mountain climbers were suffering from frost - bi...
Silicate minerals are characteristically refractory and difficult to break down.硅酸盐矿物的特点是耐熔和难以分离.refractory metals难熔金属The key to treatment of refractory ores is preoxidation and deleading absorption of carbon on gold.这些方...