lightweight造句
The vacant W.B.C. junior-
lightweight title has been called off.
空缺的世界拳击理事会次轻量级头衔被取消了。
He changed from
lightweight (under 71kg) to light middleweight (under 78kg).
他从轻量级（71公斤以下）转到了轻中量级（78公斤以下）。
Some of the discussion in the book is
lightweight and unconvincing.
书中的有些论述肤浅琐碎，毫无说服力。