howto extract all the tar.bz2 files in the same directory?

[Zhengquan Zhang mailing list <zhang.zhengquan.mailinglist@gmail.com>]

I want to extract lots of tar.bz2 files in one directory, and I want the
extracted files to be of the original names with out the tar.bz2 extension.

Is there a way to extract them all at once?

Thank you.