炎炎夏日,背着行囊走在山野、丛林,汗水浸湿了你的衣装。正看那长征路上美丽的风景,忽然耳边传来恼人的“嗡嗡”声,就像演唱会上的话筒故障发出的啸音般的煞风景。你开始在路上挥舞着手中的登山杖,以驱赶这些恼人的小虫,而小虫子们灵活地躲避着,用他们的声音来嘲笑你那笨拙的挥舞,你几乎抓狂了,无奈了,怎么办? In the hot summer days, carrying backpacks in the mountains and jungle, the sweat soaked your clothes. Looking at the beautiful scenery on the Long March road, an annoying “squeaky” sound came from the ear, like a squeaky squeaky view of a microphone failure at a concert. You started waving the trekking poles on the road to drive out these annoying bugs, and the bugs were so flexible that they avoided them and used their voices to laugh at your clumsy waving. You were almost crazy and helpless. Why? do?