Arrange the troopers with intervals in two parallel lines and cause them to advance as if to pass through the intervals, first at guard and later at charge saber.

让骑兵面对面交替排成两条平行线并使他们相对前进，好像要穿过彼此间的间距，首先采取防卫姿势，接着是冲锋姿势。

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In addition to clearing our last remaining scientific hurdle, we need to advance a parallel engineering agenda into key reactor technologies that will enable commercial fusion power plants to reliably deliver electricity in a highly competitive market.

CNN: Nuclear fusion is the 'perfect energy source'