作物在自然条件下生长发育,经常会遇到温度过高过低、水分过多过少等不良环境条件的影响,有的可能会因遭到伤害而死亡,有的则能够生存下去。这是因为作物对不良的环境条件有一定的适应性和抵抗能力,这种适应性和抵抗能力,是作物在长期的系统发育过程中与不良环境斗争而产生和发展起来的。因此, Crops grow and develop under natural conditions. They often encounter adverse environmental conditions such as over-low temperature and too little water. Some of them may die as a result of being injured and others may survive. This is because the crop has some adaptability and resistance to bad environmental conditions, which is generated and developed by crops in their fight against adverse environment in the long-term systematic development. therefore,