The purification filter element unit is of a cylinder shape or a cuboid shape.

净化滤芯单元为筒状 或长方体状。

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The most dangerous load case, most stressed element unit, structure design, etc. are discussed based on the calculation results.

分析计算结果，并针对最危险工况、危险单元、结构设计等进行了初步探讨。

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The antenna element has a ridge element unit (21) for adjusting antenna characteristic corresponding to a ridge portion and a radial element unit (22) for electromagnetic wave radiation.

天线元具有调整与脊形部分相对应的天线特性的脊形元单元(21)、和用于电磁波辐射的辐射元单元(22)。

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The element is carbon. That is the smallest unit.

那个元素是碳，是最小的单位。

麻省理工公开课 - 固态化学导论课程节选

Just as with Apollo, any modern venture would need some kind of CSM element for the astronauts, together with a departure stage - a propulsion unit that could accelerate the astronauts' vehicle out of low-Earth orbit, putting it on a path to the Moon.

BBC: Manned flight around Moon considered