研究人员说紧密的金属甲胄可能会给士兵们带来更多安全感，但是整天穿着这么重的盔甲肯定让人不好受。
The researchers say that the tight, metal shell may have made the soldiers feel safer.But being weighted down probably made it a long day for a knight.
降温使得硬盘内部的金属和塑料部件接合的更加紧密。
Lowering the drive's temperature causes its metal and plastic internals to contract ever so slightly.
几乎所有的金属材料产品与制品及建筑、机械、军工产品等，都直接与之发生紧密的联系，对冶金产品检验质量的控制和科研等方面起着积极作用。
Almost all the metallic products, building material, machinery and military products have directly relations with it and take positive effect to the quality inspection and scientific research.
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