To teach a dog this skill, the master makes a simple trail by walking some distance in a straight line.

为教豿学会这个本领，主人按走直线走得远一些的办法并做简单的记号，之后把小棍留在路的那头。

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The shortest distance between two points is a straight line - unless you happen to be traveling in an airplane.

两点之间直线最短——航班却不走直线。

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Measured in a straight line represents the distance between two points.

以直线量度单位表示的两点之间的距离。

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The data include readings from an on-board gyroscope to establish if the truck is moving in a straight line, turning or stationary and a tachometer, to cross-check the distance covered.

ECONOMIST: Another humiliating blow for German industrial policy