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·格雷伯

·格雷伯

·格雷伯

·格雷伯

1

Male nursery web spiders lure mates with silk-wrapped offerings , only some of which contain tasty treats. Cynthia Graber reports .

雄性保育蛛用丝裹的物品引诱雌性，只有部分这类物品里面有美味的食物。辛西娅 ·格雷伯报导。

3

A prototype noise-canceling device that silences the dentist's drill could make dental care more appealing . Cynthia Graber reports

一个可以消除牙钻噪音，使口腔保健更有吸引力的降噪装置样品。辛西娅 ·格雷伯报道。

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