光合作用 guāng hé zuò yòng 🔊 photosynthesis + Keep this word Meanings guāng hé zuò yòng photosynthesis Its characters 光guānglight; ray (CL:道[dao4])HSK 4合héto closeHSK 5作zuòto do; to engage in用yòngto use; to make use of; to employHSK 3