如果一个词的本义能分析出意义相反的因子，那么词义就极易发生反向引中，孳生出新的意义。
If there are any opposite meaning factors to be analyzed out from the original meaning of a word, then it is very likely to incur reverse connotation and breed some new meanings.
与阻断激动剂效应的拮抗剂不同，反向激动剂产生的效应与激动剂相反。
Different form antagonist that blocks the effect of agonist, inverse agonist produces opposite effect to that of agonist.
轮椅之间的正向和反向通过一个滚机制美德，在一个方向变化的争夺和单相反的方向，从而防止约束力。
A wheelchair which shifts between forward and reverse by virtue of a roller mechanism which grabs in one direction and slips an opposite direction, thereby preventing binding.
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