重点讲解：
1. bark up the wrong tree 走错路线；搞错方向；想法不对路；
例句：Scientists in Switzerland realised that most other researchers had been barking up the wrong tree.
瑞士科学家意识到其他研究者大多研究方向不对头zFN|!Jz]wheFgQHOuI。
2. take turns/take it in turns 轮流；依次；
例句：We took turns to drive the car.
我们轮流开车_uTSCYx.3gyq3[y,X。
例句：You can take it in turns to babysit.
你们可以轮流照看孩子!NJe[PO,yp)H3h*nSR。
3. bow out 退出；
例句：He had bowed out gracefully when his successor had been appointed.
他在继任者被任命后体面地引退了SsthtlHr+5Tc。
4. wolf down 狼吞虎咽地吃；
例句：He wolfed down the rest of the biscuit and cheese.
他把剩下的饼干和奶酪一扫而光AFR~S26l9tJ*TqPI3l^!。