观察产痛程度、产程进展。
牛牛在里面产崽，为了保护它的幼崽，它一边产崽一边被人观察着。
Niuniu had given birth inside and was now being observed ashe lay, protecting her cub.
牛牛在里面产崽，为了保护它的幼崽，它一边产崽一边被人观察着。
Niuniu had given birth inside and was now being observed ashe lay, protecting her cub.
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