Take, for example, the simple sentence: "The man climbed up the hill"以Themanclimbedupthehill这个简单句为例。Many factors are important, for example class, gender, age and ethnicity.许多因素都很重要，如阶级、性别、年龄及民族。There are many sources of...
在相同的条件下,分子速度分布在任何时候都是恒定的.At any given instant the distribution of molecular speeds is always constant under the same conditions.它使火车在通过现有轨道的弯曲处时得以保持恒定的车速。It allows the train to maintain a constant speed through the twist...
There was a drift of smoke above the trees.树林上空飘浮着一股烟。As rural factories shed labour, people drift towards the cities.由于农村的工厂纷纷裁员，人们逐渐流向城市。Here and there a drift across the road was wet and slushy.路上不时会有吹聚起的积雪，泥泞而湿滑。...