But why would a female whale stick around for so long after she's done adding to the gene pool?
但是为什么雌性鲸鱼在添加到基因库后，会持续这么长时间呢？
For the first time, biologists have documented the gorillas in the wild, using simple tools to perform rudimentary tasks such as poking a stick in a swampy pool of water to check its depth.
生物学家第一次在野外观察到了大猩猩利用简单的工具完成原始的任务，例如用一根棍子戳入沼泽水塘以试探其深度。
For the first time, biologists have documented the gorillas in the wild, using simple tools to perform rudimentary tasks such as poking a stick in a swampy pool of water to check its depth.
生物学家第一次在野外观察到了大猩猩利用简单的工具完成原始的任务，例如用一根棍子戳入沼泽水塘以试探其深度。
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