master key万能钥匙例句：The thief must have used a master key to open the safe.小偷一定是用万能钥匙打开保险柜的。make both ends meet 收支平衡例句： We have to cut our expenses to make both ends meet.我们要削减开支，使收支平衡。What did he look like? 他长的什么样？例句：A: What did he look like? B: He had blond hair, blue eyes, thick eye brows. A：他长的什么样？ B：金发碧眼，粗粗的眉毛。