留一手 (liú yī shǒu) — to hold back a trick or two (in teaching a trade or skill)

뜻

예문

• 师傅教徒弟时总是留一手，怕徒弟超过自己。
  Shī fu jiào tú dì shí zǒng shì liú yī shǒu, pà tú dì chāo guò zì jǐ.
  The master always holds back a trick or two when teaching apprentices, afraid they'll surpass him.
• 他学手艺的时候，老师傅给他留了一手。
  Tā xué shǒu yì de shí hou, lǎo shī fu gěi tā liú le yì shǒu.
  When he was learning the craft, the old master held back a trick from him.
• 别留一手了，把你知道的都教给我们吧。
  Bié liú yī shǒu le, bǎ nǐ zhī dào de dōu jiāo gěi wǒ men ba.
  Don't hold back — teach us everything you know.