huà zuò
to change into
to turn into
to become
fēng huà zuò yòng
weathering (of rocks)
erosion (by wind etc)
tóng huà zuò yòng
assimilation
anabolism (biology)
constructive metabolism (using energy to make proteins etc)
qū huà zuò yòng
chemotaxis (movement of leukocytes under chemical stimulus)
yì huà zuò yòng
catabolism (biology)
metabolic breaking down and waste disposal
dissimilation
guāng huà zuò yòng
photochemical effect
photosynthesis
photolysis