Glass hives offer a close-up view of the bees at work, with the queen bee in each hive marked by a white dot.
玻璃蜂房可以近距离观察工作中的蜜蜂，每个蜂房的蜂王都被打上白点标记。
Experts from Brazil and Europe have joined in the detective work at USDA's bee lab in suburban Washington.
来自巴西，欧洲的科学家已经加入了在位于华盛顿郊区的USDA蜜蜂实验室的探测工作。
Experts from Brazil and Europe have joined in the detective work at USDA's bee lab in suburban Washington.
来自巴西，欧洲的科学家已经加入了在位于华盛顿郊区的USDA蜜蜂实验室的探测工作。
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