精选优质文档-倾情为你奉上1.【In fact, various emotional states give rise to certain patterns of electrical activity in the facial muscles and in the brain.】事实上，多种的情感状况会在面部肌肉及大脑里产生某种形式的脑电活动。2. 【Some mountains were formed as a result of these plates crashing into each other and forcing up the rock at the plate margins.】一些山脉是由于板块相互碰撞并且板块边缘向上施压形成的。3. 【Animal dung enriches the soil by providing nutrients for plant growth. 】动物的粪便通过向土壤提供营养物来促进植物生长。4. 【For example, in 1875 one biologist pointed out
