BB：棕熊/黑熊

“棕熊/黑熊”在英文中常缩写为“BB”，这一简称便于提高书写和使用的效率，尤其在环保机构、自然保护研究等专业领域被广泛采用。

Brown to black North American bear; smaller and less ferocious than the brown bear.
产于北美洲的黑色熊；比棕熊小且不及棕熊凶恶。
In the ML analysis of combined data, the lineage ( brown bear / polar bear ) was more closely related to American black bear than was Asiatic black bear, however, there was low bootstrap support for this relationship.
合并数据集的系统发育分析表明棕熊和北极熊与美洲黑熊的关系最近，而不是亚洲黑熊，但是支持率不高。
If you met brown bear, falling down to the ground to pretend death. If it was the black bear, moving body actions obviously, and tried to make very loud sounds.
如果碰到棕熊，屈身在地上装死。如果是黑熊，夸大肢体动作，并且设法发出很多声音。

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