The variation in the idiom “Jack of all trades” from the origina

The variation in the idiom “Jack of all trades” from the original form “Jack of all trades and master of none” is( ) .
【正确答案】：SHORTENING
【题目解析】：“万事通”这个习语的变体从原来的“样样精通，样样稀松”缩短而来。