a. 流线的, 流线型的, 集成一个整体的, 现代化了的, 精简了的, 合理化了的

Streamline \Stream"line`\, a.
Of or pert. to a stream line; designating a motion or flow
that is free from turbulence, like that of a particle in a
streamline; hence, designating a surface, body, etc., that is
designed so as to afford an unbroken flow of a fluid about
it, esp. when the resistance to flow is the least possible;
as, a streamline body for an automobile or airship; -- the
current usuage prefers the term {streamlined}.
[Webster 1913 Suppl.]