当非洲产毒蛇感觉的时候威胁它将会从地面抬起它的前面和头大约3 - 4尺，打开它的口，传布一个平坦的垂兜，而且摇头。
When the mamba feels threatened it will raise its front and head about 3-4 feet off the ground, open its mouth, spread a flat hood, and shake its head.
侧兜采用高弹性面料，并运用平口式设计，在您不脱下 背包 的情况下就可轻松取放物品。
The side packets are flat, covered with a stretch bottle pocket that's angled perfectly for bottle access without taking off the pack.
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