Meaning of bù dà:
bù dà
不大
Adverb
not very; not too; not often
Jīntiān tiānqì bù dà hǎo.
今天天气不大好。
Today's weather is not very good.
Tā duì zhè bù diànyǐng de xìngqù bù dà.
他对这部电影的兴趣不大。
He is not too interested in this movie.
Tā huí jiā bù dà.
他回家不大。
He does not go home often.