Essentially,a theory is an anstract ,symbolic representation of what is conceived to be reality.理论本质上是对已认识的现实事物抽象、符号化的表述。
Long before children are able to spreak or understand a language they communicate through facial expressions and by making noise.在孩子会说话和理解语言之前通过面部表情和制造噪声和别人交流。
Thanks to modern irrigation,crop now grow abundantly in areas where are nothing but cacti and sagebrush could live.多亏了现代灌溉技术。庄稼能在这片只有仙人掌和灌木生存的地方茂盛的生长。
