金矿的主要载金矿物分别为:毒砂 、 磁黄铁矿 、 黄铁矿 、 方铅矿和闪锌矿.The main gold bearing minerals include arsenopyrite, pyrrhotine, pyrite, galena and sphalerite.与黄药相比,乙硫氮是方铅矿更好的选择性捕收剂.Diethyldithiocarbamate was more better selective collector than...
Jim signaled his helplessness to Mary to leave the party.吉姆无法从宴会脱身时,他向玛丽使了个眼色,表示无可奈何.The incident left me with a sense of helplessness.这次事件使我产生一种无能为力,听天由命的感觉.A feeling of utter helplessness washed over him.一种全然无助的感觉涌上他的心...
The usual symptoms are dyspnea, and sometimes paroxysmal nocturnal dyspnea.其常见症状是呼吸困难, 有时呈阵发性夜间呼吸困难.There may be dyspnea after exertion.运动后会呼吸困难.The patient has dyspnea, tachycardia, and cyanosis.病人呼吸困难, 心动过数及发绀....
他的独木舟在险滩下面的河水中。His canoe was there, on the river below the rapids.汽艇穿过激流,绕过险滩.The motorboat cut across swift currents and skirted dangerous reefs.由他掌舵, 通过这段激流险滩是万无一失的.With him at the helm, we are a hundred percent safe c...