blind alley　死胡同 
You are heading into a blind alley.你正在钻牛角尖。 
blow hot and cold　摇摆不定 
This guy seemed to have no own idea.He always blew hot and cold.

这家伙好象没什么主张，总是摇摆不定。 
blow one’s own trumpet　自吹自擂 
Don’t blow your own tumpet.Let us see what on earth you can do.

不要自吹自擂了，让我们看看你到底能做什么。 
born with a silver in one’s mouth　出生在富贵人家 
He is born with a silver in one’s mouth.他是含着金钥匙出生的。 
bland new 崭新的 
a bland new coat　新衣服 
break the ice　打破沉默