by definition 按照定义为介词短语作方式状语
But sometimes things may be made darker by definition. 但是,有时事物很难定义。
Perhaps marketing is by definition principled.也许市场营销按定义而言就是有规则的。
By definition a cataract is an opacity in the lens. 白内障的定义就是晶状体混浊。
Parallel lines are, by definition, lines on the same plane that never join.
按照定义说, 平行线是在同一平面上永不相交的线。
备注：principled adj.原则性强的；坚持操守的
She was a strong, principled woman.她是一个坚强而有原则的女人。
You have to take a principled stand. 你得讲原则。
She is a principled woman.她是个坚持原则的女人。
