特写镜头，一头黑白奶牛的嘴在反刍，口鼻处有苍蝇，侧面。

d macro footage of a black and white Holstein cow chewing food. The video captures the jaw movement from both side and frontal angles. A swarm of flies and insects are crawling on and biting the cow's wet nose and mouth area, illustrating pest issues in livestock farming. Ideal for veterinary, agriculture, and animal hygiene concepts.

光厂(VJshi)视频提供特写镜头，一头黑白奶牛的嘴在反刍，口鼻处有苍蝇，侧面。视频素材下载，适用于生物学，农业，愤怒，奶制品，有蹄哺乳动物等主题的内容创作。

作者署名：IIhor/Getty Images/华夏视觉