CONVENTION
（表示無趣或不重要）…啊之類的；等等；諸如此類的
You use blah, blah, blah to refer to something that is said or written without giving the actual words, because you think that they are boring or unimportant.
例句
...the different challenges of their career, their need to change, to evolve, blah blah blah.
他們的職業面臨的各種不同的挑戰，需要求變，需要發展，等等