资料来源 : Webster's Revised Unabridged Dictionary (1913)

Left-hand \Left"-hand`\ (l[e^]ft"h[a^]nd`), a.
   Situated on the left; nearer the left hand than the right;
   as, the left-hand side; the left-hand road.

   {Left-hand rope}, rope laid up and twisted over from right to
      left, or against the sun; -- called also {water-laid
      rope}.