扶轮社员不会问杯子里的水是半满或半空，扶轮社员会问谁需要一杯干净的水。
Rotarians do not ask is the glass half empty or half full, Rotarians ask who needs a glass of clean water.
它可以在你的指挥下，飞行或停留在半空中。
这是由于，它并不像跑步机那样，你的身材同时受着步辇儿或跑步的影响，椭圆练习仪更多的是被以为是在半空中步辇儿。
This is because, unlike a treadmill in which your body absorbs the impact of walking and running, the Elliptical trainer if often described as walking in midair.
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