The ability of clay minerals to catalyse decarboxylation has long been recognised.粘土矿物能催化脱羧基作用是早已认识到的问题.The results demonstrate that this catalyse has an excellent activity and selectivity this reaction.结果表明该催化剂对此合成反应具有很...
a leading supplier of computers in the UK英国一家主要电脑供应商They struck a deal with their paper supplier, getting two years of newsprint on credit.他们同纸张供应商达成协议，可赊购两年的新闻用纸。By changing its supplier, the company saved thousands of ...
The rhododendrons encroached ever more on the twisting drive...越来越多的杜鹃花长到了蜿蜒的车道上。His new farm buildings encroached on his neighbour's land.他的新农场建筑侵占了邻居的土地.His new farm buildings encroached on his neighbour’s land.他的...
Springs and rivers that drain into lakes carry dissolved nitrates and phosphates.流入湖中的泉水和河水携带了溶于水的硝酸盐和磷酸盐。Nitrates are chemicals that occur naturally in water and the soil.硝酸盐是水和土壤中自然存在的化学物质。Nitrates leach from the soil ...
真正的危险是该国东部地区的民众动乱。The real danger is civil unrest in the east of the country.更加危险的动乱区在首都之外。The more serious flashpoints are outside the capital.军队最终平息了动乱。Troops eventually quelled the unrest....