A：Mike promised to help us.
邁克答應(yīng)幫助我們。
B：Mike? How can you trust him to help us?
邁克?你怎么能相信他會(huì)來幫助我們?
A：Why not?
為什么不能呢?
B：He is too unpredictable. He says anything that pops into his head. And then he forgets it all.
他太讓人難以琢磨。他總是想起什么就說什么，可是過后一會(huì)兒就忘了一切。