You might need a riser to help lift your laptop or monitor to a good, eyeballs-dead-center position.

可能你会需要一个架子来保证你的笔记本或者显示器处于一个良好的、在你视线正中的位置。

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Further, the piston is operated at the top dead center position and in the resonance state under all load conditions, thereby further increasing operation frequency.

此外，在所有负载条件下将活塞操作在上死点和共振状态，从而进一步增加操作频率。

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