Two - stage chromate reduction has been used at several plants.一些厂已采用两段铬酸盐还原法.The potassium chromate method is one regular method to determine COD.重铬酸钾法是测定化学需氧量的常规方法.Cr - Fe waste residue is derived from production of ch...
Roshan Jason is executive director of the ASEAN Inter - Parliamentary Myanmar Caucus in Malaysia.罗山.贾森是东盟设在马来西亚的缅甸问题议会委员会负责人.The species found sporadically along Myanmar coastal areas is Melo melo, a gastropod.此物腹足动物种在缅甸...
Please don't trample on the azaleas.请勿踩踏杜鹃花。Don't trample on the grass.勿踏草地.Don't trample mud from your shoes on to the floor; I've just this minute swept it.不要把你鞋上的泥踩在地板上, 我刚刚才扫过地....