Using an alternating high- and low-bias voltage, we have formed hydrogen-free multilayers of hard and soft diamond-like carbon films.

本文采用交替施加高偏压和低偏压的方法，合成出了具有软膜和硬膜结构的无氢类金刚石多层膜。

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There are many theories for radical alternating copolymerization, among which the free monomer-complex theory is more rational.

自由基交替共聚理论是共聚合研究中的重要理论问题。

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For high levels of free-stream turbulence, streaky structures in boundary layer with the spanwise variations alternating will be generated.

对背景湍流度很大的流动，边界层中有时会产生沿展向周期分布的流向速度的条纹结构。

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If you don't want to abstain entirely, there are ways that can help you cut down, including opting for smaller glass sizes, diluting alcohol with soda water or a low-calorie soft drink, alternating between alcoholic and non-alcoholic drinks and keeping a few nights each week booze-free.

BBC: Alcohol calories 'too often ignored'