外骨骼系统一直是漫画书和未来风格电影中不可缺少的元素之一，但现在，它们已不再是一种科学幻想了。
Exoskeletons have long been a fixture of comic books and futuristic movies, but they aren't science fiction any more.
过去期货叫商品，是经济中不可缺少的元素。
Futures used to be called commodities, the irreducible building blocks of the economy.
铜是生物体不可缺少的一种元素，在细胞内把铜转运到含铜的蛋白质是细胞正常代谢的基本要求。
Copper is an essential element for living organism, and transporting copper to copper -dependent proteins is a basic requirement for normal cellular metabolism.
钙是人体健康和长寿不可缺少的重要元素，钙的生理功能及缺钙对人体健康的影响日益受到重视。
Calcium is an important element for a good health and long life. Importance is increasingly attached to its physiological function and the impact of calcium deficiency on human health.
而入口是建筑形态构成不可缺少的基本元素之一，它控制着两种不同空间的转换，是形成空间序列和节奏性的关键所在。
Entrance is indispensability factor of building, it is keystone of forming the sequence space and control the transform of differ space.
艺术型建筑物是一座有魅力的城市不可缺少的元素。
Artistic buildings are an essential component of a city's charm.
然而这些现象在真实感图形模拟中又是不可缺少的重要元素，因而不规则事物模拟一直是真实感图形模拟的研究热点之一。
However, these appearances are important element in realistic image simulation, that's why the simulation of irregular things has become one of the hottest research points in computer graphics.
铜、锌、钴、镍是过渡元素，是人体中不可缺少的微量元素，是一些重要酶的活性中心，且均有良好的抑菌活性。
Cu, Zn, Co and Ni are indispensable trace elements in human body, which are all transition elements. They serve as important active sites of enzymes, and have good antibacterial activities.
通过分析研究得到，对语法元素进行二值化是CABAC算法中不可缺少的一个关键步骤，二进制化算法的合理与否直接影响着CABAC算法的编码效率的优劣。
By careful analysis, we found that the binarization of the syntax element is a neglected process in CABAC, and the binarization's property will directly affect the coding efficiency.
Blues品牌以其特有的蓝调忧郁魅力，是世界流行服饰中不可缺少的一个元素。
The keynote of the brand is its sadness and depression from the music of Blues; it is indispensably to the word trendy items.
Blues品牌以其特有的蓝调忧郁魅力，是世界流行服饰中不可缺少的一个元素。
The keynote of the brand is its sadness and depression from the music of Blues; it is indispensably to the word trendy items.
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