Wùlǐ kè shàng, lǎoshī jiǎng le ā'ěrfǎ, bèitǎ hé gāmǎ sān zhǒng shèxiàn de qūbié.
In physics class the teacher explained how alpha, beta and gamma rays differ.
Tips
usage
In print the letter β itself is more common, as in β-rays; 贝塔 is how it is said and spelled out in characters. A software beta is usually 公测 (open beta) or 内测 (closed beta).
