改良 gǎiliáng to improve (something)
to improve (something); to reform (a system)
How to remember 改良: 改 alter + 良 good = to improve (something).
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How it is used
- To improve a concrete thing gradually - 改良品种 (gǎiliáng pǐnzhǒng) improve a crop/livestock breed; 改良土壤 (gǎiliáng tǔrǎng) enrich the soil.
- Contrast 改革 (gǎigé, reform systems/institutions): 改良 is incremental betterment of a thing or method, not radical change.