初次分配和再分配都要兼顾效率和公平，再分配更加注重效率。

Intact buoyancy is a term used to describe（）.

A.the volume of all intact spaces above the waterline

B.an intact space below the surface of a flooded area

C.an intact space which can be flooded without causing a ship to sink

D.the space at which all the vertical upward forces of buoyancy are considered to be concentrated