be disappointed by的意思|示意

因为某事感到失望 ... a little 稍微，有一点 be disappointed by 因为某事感到失望 do as you are told 正如你被告知的去做 ...

对…失望 ... be disappointed to do 失望地做… be disappointed by 对…失望 to one's disappointment 令某人失望 ...

因…而失望 ... be interested in 对…感到兴趣 be disappointed by 因…而失望 provide sb. with sth. 给某人提供某物 ...