Ice cores contain evidence that sudden cold periods occurred after the north atlantic became less salty, perhaps because freshwater lakes burst through the walls of glaciers and found their way to the sea
冰心內的證據顯示，北大西洋水體
鹽度降低后驟冷時期才開始，這或許是由於淡水湖的水沖破冰河築成的
屏障流入海中所致。
Electromagnetic wave shielding fabric was prepared by in - situ chemical polymerization of aniline in the presence of cotton substrate, using hydrochloric acid as the doping agent and ammonium persulfate as the oxidant
摘要以鹽酸為摻雜劑，過硫酸銨為氧化劑，在棉織物表面採用現場吸附聚合法生成一層導電聚苯胺，由此設計出一種具有良好電磁屏蔽效能的織物。
