[ liúyīshǒu ] hold back a trick or two (in teaching a trade or skill)
Example Sentences:
1.
Remember to keep a hand free when you are on a bus . .记得留一手，留一只手来握扶手。
2.
Speak not all you know , do not all you can , believe not all you hear 话到嘴边留三分，做事之时留一手，听闻之事莫尽信。
3.
Ian ： wow , you surely have a card up your sleeve ! while we hope sunrise can get through this crisis , this is the best we can do for now 哇，你还真是有留一手的锦囊妙计呢。我想，我们除了祝福中兴百货这次能度过难关，这也是我们目前能做的最好安排了。
