生耗氧量

生 = 牛 + 一 : Mnemonic symbol: a cradle.

Sherlock Holmes (sh) comforts a crying baby bull (牛) in a cradle (生) in front of the engine ((e)ng1) and plays him a tune on a flute (一).

耗 = 毛 + 耒 : Hamlet (h) got the task to drive a plow (耒) through a lot of hair (毛) in the aorta's bathroom (ao4). He thinks that it is just a waste (耗) of gasoline (油耗) because it requires a lot of time and energy (耗时耗力), but he does it anyway.

氧 = 气 + 羊 : Maud Younger (y) gave the sheep (羊) a balloon (气) inside of the anglepod (ang3), but unfortunately it doesn't float because it is filled with oxygen (氧).

量 = 旦 + 里 : Li Qingzhao (li) uses a measuring cup (量) for a recipe in the anglepod's kitchen (ang2). Unfortunately she made a terrible mistake: instead of measuring cups (旦) of sunflowers (里), she throws sunflowers and cups together into a measuring cup.