Traditional: 直線
直线 (zhí xiàn) means “straight line; sharply (rise or fall)”. It is an HSK 5 Chinese word (traditional 直線) in the HSK 3.0 vocabulary.
两点之间直线最短。
Liǎng diǎn zhī jiān zhíxiàn zuì duǎn.
A straight line is the shortest distance between two points.
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