她穿着加拿大队的运动衫，戴着羊毛帽和太阳镜，拿起金牌，拍了张照片，把奖品翻过来看背面。

Wearing a Canada team sweatshirt, a woolen cap and sunglasses, she picked up the gold medal, snapped a photograph and turned over the prize to see the back.

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当蝗虫群被发现时，科学家会用铲子弄来一些虫子，然后在它们的背面贴上反射镜。

When a swarm is detected, the scientists will scoop up a few dozen insects and glue little reflectors on their backs.

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射电望远镜安装在月球背面就可以探测到那些无法在地球表面被检测到的长波，因为它们都被地球大气层的最外层吸收了。

A lunar-based radio telescope would be able to detect long wavelengths that cannot be sensed on Earth because they are absorbed by the outermost layers of the planet's atmosphere.

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