当春未夏初之际,我们清晨沿着水田、池沼或水草叢生的沟渠边缘散出,常常有机会看到雌雄抱接着的青蛙。若不惊动它们,躲在远一点耐心等候,就不难获得剛受精不久的一大堆蛙卵。为了详细地观察蛙胚发育的各个阶段及其演变过程(外貌的观察或制成切片作显微镜观察),可迅速把它采集到实验室中进行人工培育。但若不得其法,往往在培育中很快就会死亡。其中最值得注意的是水質和水温以及氧的供应等问题。至于饲料只是后期所需要的;从受精卵发育一直到初(?)化的蝌蚪开日后数日间,完全依靠卵本身所(?) When the spring is not early summer, we disperse along the edges of paddy fields, ponds, or weeds in the early morning, and we often have the opportunity to see frogs that are both male and female. Without disturbing them, hiding a little further patiently waiting, it is not difficult to get a lot of frog eggs just fertilized soon. In order to observe in detail the various stages of the development of the frog embryos and their evolution (the appearance of the observation or made into sections for microscopic observation), it can be quickly collected into the laboratory for artificial breeding. But if it does not work, it often dies shortly after cultivation. The most noteworthy of these issues are water quality and water temperature as well as oxygen supply. As for the feed is only needed later; tedpoles from the development of the fertilized eggs until the beginning of the day after the opening days, relying entirely on the egg itself (?)