做夹子的虾壳可不是从厨余垃圾里翻出来。科学家们先把零下18摄氏度的冻龙虾放到室温中完全解冻，然后去掉头部胸部、放进沸水里煮2分钟，接着用镊子把龙虾尾掏空，得到一副干干净净的外骨骼。

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COLOMBO, Jan. 25 (Xinhua) -- Sri Lanka will establish 250 health and wellness centers across the country to strengthen preventive healthcare services and reduce pressure on hospitals, the Health ...