But the ratio is even greater among active women, affecting up to 80 percent of female endurance athletes.

而在积极锻炼的妇女中这一比例更高，女耐力运动员中，缺铁者比例则高达80%。

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Honeycomb sandwich steel panel has light weight, high strength-to-weight ratio, good shock-absorbing and impact endurance.

钢质蜂窝夹芯板具有质轻、比强度高、减震、耐冲击和节省材料等优点，是一种具有良好发展前途的夹芯板。

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The utility model has the capability to vary the transmission ratio, causing the airplane model to fly at different speeds or to increase the endurance.

本实用新型可改变传动比使飞机模型以不同速度飞行或增长航时。

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