左手定则，左手定律

left-hand drive───左座驾驶

left-hand drives───左舵驾驶

left and right───左右

left-handedly───左撇子

left-hander───左撇子

left-handers───左撇子

left-hand corner───左角

Some problems about the offset of contour lines which consist of sequential lines and direction complies with left hand rule are studied.───对连续线段组成的、方向符合左手定则的平面轮廓线的偏置问题进行了研究。

In the musical performance rule of ErHu, how to use bow and finger of left hand is analyzed, that is based on the moment balance principle and bowstring principle.───从物理分析的视角出发，以力矩平衡原理、弦振规律分别对二胡演奏中的运弓及左手指位进行了分析，定量地讨论分析了“乐感”中的力度和音准问题。

If you walk clockwise, you will see that the surface is to your left or use the right-hand rule.───如果沿顺时针方向走，就会发现这个曲面在左方，或者用右手定则来判断。