beta
noun [ C or U ] language, mathematics, science uk/ˈbiː.tə/ us/ˈbeɪ.t̬ə/ (symbol B, β)
（希腊语字母表的第二个字母）
the second letter of the Greek alphabet
beta
adjective [ before noun ] computing uk/ˈbiː.tə/ us/ˈbeɪ.t̬ə/
(software)
（软件程序）尚未投放市场，处于第二个开发阶段的
Beta software is at the second stage of development.
a beta disk 一个试用磁盘
You can download the beta version from the website. 你可以在网站上下载试用版本。
(person)
腼腆的，缺乏自信的
used to describe someone who prefers other people to be in charge and may be shy or lack confidence
In the film, Stiller plays a good-hearted but put-upon beta male. 斯蒂勒在影片中扮演一个心地善良但软弱可欺的腼腆男人。
Compare: alpha adjective