2N-VAR (通过化学或生物反应进行的)合成 The synthesis of a substance is the production of it by means of chemical or biological reactions. (通过化学或生物反应进行的)合成 [technical]
...the genes that regulate the synthesis of these compounds.
控制这些化合物合成的基因
This kind of lighting encourages vitamin D synthesis in the skin.