1.科学家们不确信恐龙为什么灭绝，但是有些理论假定了地理、气候、海平面的改变是对恐龙的灭绝有影响的
2.园艺科学，就是使用从其它学科里面得来的信息，主要关注于产出最大限地的和更好的质量。
雪可以帮助农民保持浅层地面的热量，从而使种子免遭冰冻。
1. Scientists do not know why dinosaurs became extinct, but some theories postulate that changers in geography, climate, and sea levels were responsible. 点击词典
2. The science of horticulture, in which the primary concerns are maximum yield and superior quality, utilizes information derived from other sciences.
3.Snow aids farmers by keeping heat in the lower ground levels, thereby saving the seeds from freezing. .
1 Scientists do not know why dinosaurs became extinct, but some theories postulate that changes in geography,climate and sea levels were responsible
科学家们不知道恐龙为何灭绝，但一些理论假定这与地理气候条件和海平面的某些变化有关。
2 The science of horticulture,in which the primary concerns are maximum yield and superior quality,utilizes information derived from other sciences
园艺科学能利用其他学科的信息，但其主要问题是如何实现高产和高质量。
3 Snow aids farmers by keeping heart in the lower ground level,thereby saving the seeds from freezing
降雪的好处是使农民们保持较低调的心态，保存种子防止其被冻坏。
1 Scientists do not know why dinosaurs became extinct, but some theories postulate that changers in geography,climate, and sea levels were responsible.
2 The science of horticulture, in which the primary concerns are maximum yield and superior quanlity, utilizes information derived from other sciences.
3 Snow aids farmers by keeping heat in the lower ground levels, thereby saving the seeds from freezing.
1.Scientists don\'t konw why dinosaurs distinct ,but some theories postulate that changes in geography,climate,and sea levels were responsible.
2.The science of horticulture ,in which the primery concerns are maximum yield and superior quality,unilizes the information derives from other sciences.
3.Snow aids farmers by keeping heart in the lower grouns levels,thereby saving the seeds from freeing
科学家们尚不清楚恐龙灭绝的原因，但一些理论研究认为地理、气候以及海平面的变化是其元凶。
Scientists do not know why dinosaurs became extinct, but some theories postulate that changers in geography, climate, and sea levels were responsible.
园艺学最首要的关注点就是运用多门学科知识，获取最大产出和最好的质量。
The science of horticulture, in which the primary concerns are maximum yield and superior quality, utilizes information derived from other sciences.
积雪帮助农民保持地表温度，从而避免了种子被冻坏。
Snow aids farmers by keeping heat in the lower ground levers, thereby saving the seeds from freezing.
科学家不知道为什么恐龙灭绝，但是有些理论假定了地理、气候、海平面的改变是对恐龙的灭绝有影响的。
Scientists do not know why dinosaurs became extinct,but some theries postulate that changers in geography,climate,and sea levels were responsible.
园艺科技从其他自然科学利用资源，他们关注的是最多的收益和最高的质量。
The science of horticulture,in which the primary concerns are maximum yield and superior quality,utilizes information derived from other sciences.
雪能保持表层土壤的温度以帮助农民，从而挽救种子不被冰冻。
Snow aids farmers by keeping heat in the lower ground levels,thereby saving the seeds from freezing.
晕了，不知道09我还有希望不