L-9:let someone down 使某人失望
A:That's really a let-down.
A:那可真令人失望。
B:Yeah. He really does let me down.
B:是的,他確實(shí)讓我失望。
A:But that should not be the reason for you to lose heart.
A:但這不應(yīng)該成為你灰心的理由。
B:I'm at the end of the tether. I run out of ideas.
B:我再?zèng)]有精力了,我已無(wú)計(jì)可施了。