Hikers sustain a fall easily when going down a slippery path. Wet rock surfaces, muddy paths and sandy badland pose similar hazards.是什么意思_Hikers sustain a fall easily when going down a slippery path. Wet rock surfaces, muddy paths and sandy badland pose similar hazards.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句