有一对兄弟,他们的家住在80层楼上。有一天他们外出旅行回家,发现大楼停电了!虽然他们背着大包的行李,但看来没有什么别的选择,于是哥哥对弟弟说,我们就爬楼梯上去! 他们背着两大包行李开始爬楼梯。爬到20楼的时候他们开始累了。哥哥说,包包太重了,不如这样吧,我们把包包放在这里,等来电后坐电梯来拿。于是,他们把行李放在了20楼,轻 A brother, their family lives on the 80th floor. One day they went home for a trip and found that the building was out of power! Although they carried large bags of luggage, they did not seem to have any other choice, so their brother told his younger brother that we climbed the stairs and they were carrying two bags of luggage Start climbing the stairs. When they climbed to the 20th floor, they began to get tired. My brother said that the bag is too heavy, so be it, we put the bag here, and so on after taking the lift to pick up. So, they put the luggage on the 20th floor, light