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...
在这种宜人的天气里，他们健康活泼地茁壮成长。They are bouncing with health in the good weather.那间敞亮宜人的房间装有松木护墙板。The cheerful room was panelled in pine.我们总是去国外一些气候宜人的地方度假。We always take our holidays in foreign climes....
The messenger bent and scratched at his knee where the strapping chafed.送信人弯下腰来，挠着膝部被绑腿磨红的地方。He was a bricklayer—a big, strapping fellow.他是位砌砖工——一个高大健壮的小伙子。The carer will have to do all the work: placing the patient on t...