no more than:仅仅,不多于,至多,不过,仅仅
例子：It will take no more than five days to read the book.
不到五天,我就会把这本书读完.
Though they think it takes no more than three days to fulfill the mission,I believe it takes not less than six days.
虽然他们认为完成这任务只需三天,但我却认为至少需要六天.
It's no more than a misunderstanding.
这只是个误会.
no better than:和 ...一样不好,几乎是
例子：In those days,the labouring people lived no better than beasts of burden.
在那些日子里,劳动人民过着牛马般(牛马不如)的生活.
At the end of the day the new manager is no better than the previous one.
从各个方面来看,这位新经理并不比前任强.
You're no better than they are:who are you to judge other people?
你不比他们强,凭什麽指责别人?