资料来源 : pyDict

里里外外;详情,细节;内幕

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

In \In\, n.

   Note: [Usually in the plural.]
   1. One who is in office; -- the opposite of {out}.

   2. A re["e]ntrant angle; a nook or corner.

   {Ins and outs}, nooks and corners; twists and turns.