Bié / zài / dàjiā / miànqián / zhuāng / dà / yǐ / ba / láng / míngmíng / huì / zuò / què / shuō / zìjǐ / shénme / dōu / bù / dǒng

别在大家面前装大尾巴狼，明明会做却说自己什么都不懂。

Don't put on an act in front of everyone by pretending not to know anything when you clearly can do it.