directed
柯林斯词典
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、線或角)有曏的[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、線或角)有曏的[maths]