Then, in December 1987, Congress suddenly designated Yucca Mountain, Nevada, as the single site to be evaluated in detail by DOE.是什么意思_Then, in December 1987, Congress suddenly designated Yucca Mountain, Nevada, as the single site to be evaluated in detail by DOE.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句