Natural disasters have obvi-ously contributed to the continent's economic crisis.很显然，自然灾害也是造成该大陆经济危机的原因之一。The accident has echoes of past disasters.那起事故仿佛是过去灾难的重现。disasters such as floods and famine水灾和饥荒这一类灾难...
Influences of experimental parameters were studied using 4 - chlorophenol as model pollutant.以4-氯苯酚为模型污染物,研究不同反应条件的影响.Succinic acid was used as target during ozonation of chlorophenol, whose concentration measured by ion...
屋宇起平地，耕野生人烟。Signs of habitation appeared and the fields gave way to houses.劳动者们一边耕犁稻田一边唱歌。Workers were singing as they tilled the rice paddy fields.农民让土地休耕现在得到了回报。Farmers are now paid to let their land lie fallow ....