存在着许多势能和动能的能源.There exist many sources of energy both potential and kinetic.最大势能和总能量是 多少 ?What are the maximum potential energy and the total energy?因此,我们可以说,该系统有内势能.We can therefore say that the system has internal pote...
Using a pestle and mortar, pulverise the bran to a coarse powder.用杵和臼，将麸皮磨成粗粉。He ground the rock candy with a mortar and pestle.他自己动手用研钵和杵把冰糖研成粉。The pellet with the poison's in the vessel with the pestle?带有毒药的小球放在带有...