| 化 |
huà xué xū yǎng liàng | (environmental science) chemical oxygen demand; COD |
| 化 |
huā | variant of 花 |
| 化 |
huà | to make into / to change into / -ization / to ... -ize / to transform / abbr. for 化学 |
| 化 |
huà xué | chemistry / chemical |
| 学 |
xué | to learn / to study / to imitate / science / -ology |
| 需 |
xū | to require / to need / to want / necessity / need |
| 氧 |
yǎng | oxygen (chemistry) |
| 量 |
liáng | to measure |
| 量 |
liàng | capacity / quantity / amount / to estimate / abbr. for 量词, classifier (in Chinese grammar) / measure word |