VOA慢速英语:新规定会拯救珠穆朗玛峰上的生命吗？

traffic jam – n. a long line of traffic moving very slow or stopped because of road work or an accident

summit – n. the highest point of a mountain or hill

fee – n. a payment made to a person, organization or government in exchange for services or advice

window – n. a break, or stoppage, between two actions

certified – adj. officially approved as having met an established method or rules