1 turn down
1.拒绝
His proposal was turned down.
他的提议被拒绝了.
2.关小,调低；拒绝
3.拒绝采纳；拒绝考虑
4.(把音量)调低
2,put down
1.放下
Put the typewriter down here.
把打字机放在这儿.
2.写下
Will you put down your address here?
把你的地址写在这儿好吗?
3.批评;奚落;贬损
She always put down her boyfriend,but he didn't seem to mind.
她总爱奚落她的男朋友,但是他好像并不介意.
3,let down
1.使失望
Don't worry.I'll never let you down.
别担心.我决不会让你失望的.
2.放下,降低;使失望
3.使(人)失望；放下；放(长)衣服；不支持
4.让…失望
4,broke down
break down 的过去式
1.失败;故障
2损坏,分解,瓦解
3(健康等)垮掉,崩溃
4打破；发生故障；中止
或者是
broken down
形容词 a.
1.坏了的;出了毛病的
2.衰弱的