brag

Do not brag or bluff.

不要自夸和虚张声势。

It is not in good form to brag of your learning.

吹嘘自己的学识是欠妥的。

These are the people that have every right to brag and maybe be a bit arrogant, yet they remain humble.

这些人有理由吹嘘自己的成功，甚至理应有点自傲，但是他们仍然保持着低调的作风。