有机磷酸酯类

• 月(moon; flesh (iconic representation))RADICAL
• 又(right hand; again)ASSOCIATIVE

A hand holding a piece of meat — that is 'to have'.

• 酉(wine vessel; ferment)RADICAL
• 夋(slow manner; leisurely pace)PHONETIC

Fermenting alcohol produces sourness, which is exactly the character for sour.

• 米(grain; cereal)RADICAL
• 大(large; big)ASSOCIATIVE

Sorting rice grains by size from large to small and arranging them into separate groups.