木糖醇对预防患呼吸道感染或中耳炎易发儿童患急性中耳炎的疗效的证据尚无定论。

There is inconclusive evidence with regard to the efficacy of xylitol in preventing AOM among children with respiratory infection, or among otitis-prone children.

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弯曲木具有造型美观、工艺简单、成本低廉等优点，但是产品易出现回弹变形的问题亟待解决。

There are many advantages of bended wood, such as good-looking shape, simple process and low cost. The product, however, is easy to get recovery which is indispensable to be dealt with.

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