學習筆記：
ladder：梯子
例句：He gave his elbow a wrench when he fell off the ladder.
他從梯子上摔下時扭傷了手肘。
tool：工具
例句：Take up any slack in the tape with a pencil or similar tool before use.
用卡帶以前若有松弛狀態(tài)，請用鉛筆之類的工具旋緊。
trash can：垃圾桶
workbench：工作臺
car：汽車，轎車
例句：Years ago people had to crank the engine of a car to start it.
多年以前人們必須轉(zhuǎn)動曲柄發(fā)動汽車引擎。