常見例句雙語例句The primordial gonad, genital fold which composed of epithelial cells formed below the nephridium area 12 days after hatching.魚苗出膜12天，在其腎管區(qū)下方可見有一棒狀突起，由上皮細胞構成，為生殖腺原基。 返回 genital fold