留一手

中文对照

（～儿）不把本事全部拿出来老师傅把全部技艺传给徒工，再不像从前那样～了。

对照来源：本站汉语词典

留一手

拼音

liu2 yi1 shou3

to deliberately withhold essential knowledge or skills as strategic insurance (typically to maintain leverage, avoid being replaced, or preserve authority in hierarchical relationships)