earth rladbed土: soil; earth路基: bed; roadbed; subgrade; subs ...冻土路基: permafrost subgrade膨胀土路基: subgrade in swelling soil zone软土路基: soft soil subgrade下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:土路基,即可在微信中查询翻译