农作物遗传资源的保存保护现状；
The current statues of crop genetic resources in conservation.
很长一段时间里，啤酒花中的强抗菌剂保护了英国人，这种抗菌剂被添加到啤酒中以帮助保存啤酒。
For a long time, the English were protected by the strong antibacterial agent in hops, which were added to help preserve the beer.
动物园为保存和保护环境发出了关键的声音。
Zoos provide a critical voice for conservation and environmental protection.
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