为什么作者说美国农业部本可以通过制定膳食指南从而在应对气候变化方面做出很大贡献？
Why does the author say the USDA could have contributed a lot to lowering the climate cost through its dietary guidelines?
作者认为，是什么原因导致了美国农业部膳食指南忽视可持续性？
What may account for the neglect of sustainability in the USDA's Dietary Guidelines according to the author?
《银河系漫游指南》作者、英年早逝的道格拉斯·亚当斯构造出许多滑稽的生物。
DOUGLAS ADAMS, the late lamented author of "the Hitchhiker's Guide to the Galaxy", dreamed up many comic creations.
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