12 年前
视频简介
子弹经过两百年的科学研究，从一个简单的铅球，变成性能极佳的弹药。科学新发现将介绍子弹的科学，以及子弹如何凭科技的进步，演化为现在的弹药。。Have you ever wondered what it would be like to live your life off the grid? Have you wished you could shed the complications of modern society and live in the wilderness, using only the things nature has provided? Meet Eustace Conway, Tom Oar and Marty Meierotto, three men who have devoted their lives to survival in its simplest form. But how simple is it really? From the rugg...。
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