It is outrageous that people doing well-paid jobs should moan about how badly off they are.那些有着高薪工作的人竟然还抱怨自己多么缺钱，真是过分。You can go see him and have a good old moan.你可以去看看他，好好地诉诉苦。Then suddenly she gave a low, choking moan ...
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 into rivers.硝酸盐由土壤渗入江河。Nitrates are used as preservatives in food manufacture...硝酸盐在食品加工业中被用作防腐剂。Springs a...