原理: principle; tenet; axiom; theory 短语和例子根本的原理 a cardinal principle; 数学的基本原理 fundamentals of mathematics; 违反马克思主义的基本原理 contravene the basic principle of marxism; 详述 ... 的原理 develop the theory
这个: 1.(这一个) this one; this 短语和例子这个比那个好。this one is better than that one.2.(这东西) this 短语和例子他为了这个忙了好几天。 he's been busy with this for quite a few days.3.[口语] (用在动词、形容词之前, 表示夸张) so; such 短语和例子看见大象
