The special bond between Grandma and Emily was unusual because they were not related biologically.

埃米莉和奶奶的感情很不寻常——她们并没有血缘关系。

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BRAF and KRAS mutant traditional serrated adenomas are morphologically related but biologically disparate polyps with distinctive clinicopathological and molecular features.

BRAF和KRAS突变传统锯齿状腺瘤为形态学相关、但生物学上不同的息肉，具有不同的临床病理学和分子特征。

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But as studies detail plans for thousands of miles of new pipelines and related infrastructure, the dangers to biologically rich forests that have rebounded since vast clear-cutting in the 1800s are taking on new urgency.

WSJ: Northeast drilling boom threatens forest wildlife