Optimal design for the exit of the 1%23 tunnel in the north main line of Wanjiazhai Yellow River Diversion Project是什么意思_Optimal design for the exit of the 1%23 tunnel in the north main line of Wanjiazhai Yellow River Diversion Project在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句