Slopes under 25 degrees are too general. The danger zone comes between 30 and 45 degrees, just where people like to ski and sled.是什么意思_Slopes under 25 degrees are too general. The danger zone comes between 30 and 45 degrees, just where people like to ski and sled.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句