directed
柯林斯詞典
1. ADJ (of a number, line, or angle) having either a positive or negative sign to distinguish measurement in one direction or orientation from that in the opposite direction or orientation (數(shù)、線或角)有向的[maths]
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1. ADJ (of a number, line, or angle) having either a positive or negative sign to distinguish measurement in one direction or orientation from that in the opposite direction or orientation (數(shù)、線或角)有向的[maths]