重點(diǎn)講解：
1. be known as 稱為；叫做；認(rèn)為；
例句：The violin is known as the queen of instruments.
小提琴有樂器皇后之稱kAZW]GO^%vQ+%8R。
2. cut down 砍倒（樹木）；
例句：A vandal with a chainsaw cut down a tree.
一個(gè)故意破壞公物的人用鏈鋸伐倒了一棵樹r&tamuViA0-。
3. pass down 使流傳；
例句：Folk music has been passed down from one generation to another.
民間音樂是一代一代流傳下來的IF&#|LG*9bT_G。
4. for sure 無疑;肯定；
例句：Nobody knows the cause of the fire for sure.
沒有人確切地知道大火的原因&qxEAZq#)NeL&。
5. at the most 至多；最多；
例句：It will take two hours at the most to get there.
最多兩小時(shí)便可到達(dá)那里V~_jmY4ipJ7yUZqh。