Thanks to her diligent work, residents and volunteers had no problem answering the call of nature.

由于她的辛勤工作，居民和志愿者无障碍地上厕所。

Like a baby, a pet needs to answer the calls of nature and will be subject to the forces of nature.

像婴儿一样，宠物可能也要临街大小便，而且可能不能要求它们忍住。