beta
noun /ˈbiːtə/
/ˈbeɪtə/
- the second letter of the Greek alphabet (B, β)
希腊字母表的第 2 个字母 - (also beta version)[usually singular] a version of a product, especially computer software, that is almost ready for the public to buy or use, and that is tested by people who do not work for the company that is developing it
（尤指计算机软件等新产品上市前的）β 版，测试版
词源via Latin from Greek.