yǎng zhí hù / tōng guò / gǎi shàn / shuǐ zhì / hé / sì liào pèi fāng / tí gāo le / luó fēi yú / de / chéng huó lǜ

养殖户通过改善水质和饲料配方，提高了罗非鱼的成活率。

Fish farmers improved the survival rate of tilapia by improving water quality and feed formulations.