abbr. for mathematics 數學|数学[shu4 xue2], physics 物理[wu4 li3] and chemistry 化學|化学[hua4 xue2]
Definitions (Wiktionary)
noun
mathematics, physics and chemistry
學好數理化,走遍天下都不怕。
学好数理化,走遍天下都不怕。
xué hǎo shù lǐ huà , zǒu biàn tiān xià dōu bù pà . A mastery of maths, physics and chemistry is a key to global success. (common saying)