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1·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%。

2·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。

3·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。