伯尔尼的研究人员在镍铁矿中发现了氖 - 21.And neon - 21 was found in josephinite by the Bern researchers.在伟晶岩接触带,硫化物成分变为黄铜矿 、 针镍矿 、 黄铁矿及硫镍铁矿, 伴生有磁铁矿和赤铁矿.At pegmatite contacts the composition changes to chalcopyrite, millerite, pyrite, and ...
机械磨尖的钩子便于再次磨尖, 比较经济.Mechanically sharpened hooks are easy to resharpen, which will save money.那个二垒守垒员每场比赛前都要磨尖他的鞋钉.The second baseman sharpened his spikes before every game.你们要磨尖了箭头, 抓住盾牌.Sharpen the arrows, take up the ...