Rolledbales of hay should be used only when absolutely necessary, and only if theouter layers are removed and discarded.

确实需要时可以使用成捆的干草，但外层要剥掉废弃

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Wearing your heels only when absolutely necessary can reduce the likelihood that you develop heel-related health problems such as ankle sprains, early onset osteoarthritis, and joint problems.

只在真正有必要的时候才穿高跟鞋可大大减小你患高跟鞋引起的健康问题的可能性，如踝关节扭伤，早期骨关节炎和其他关节问题。

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Wearing your heels only when absolutely necessary can reduce the likelihood that you develop heel-related health problems such as ankle sprains, early onset osteoarthritis, and joint problems.

只在真正有必要的时候才穿高跟鞋可大大减小你患高跟鞋引起的健康问题的可能性，如踝关节扭伤，早期骨关节炎和其他关节问题。

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