tā / jiāo / tú dì / shí / zǒng shì / liú yī shǒu / bù kěn / bǎ / suǒ yǒu / jì qiǎo / dōu / chuán gěi / duì fāng

他教徒弟时总是留一手，不肯把所有技巧都传给对方。

When training his apprentice, he always holds something back and refuses to pass on all his skills.