unnecessary
adj
(a) [usu pred 通常作表语]
not necessary or desirable; superfluous 不需要; 不必要; 多余
It´s unnecessary to cooka big meal tonight. 今晚不必做很多饭.
(b) [usu attrib通常作定语]
more than necessary; excessive 超过需要的; 过度的
unnecessary expense 多余的开销.
(c) (of remarks, etc) not required in a situation and likely to be offensive; gratuitous (指言语等)无必要而可能得罪人的, 没来由的
an unnecessary reference to his criminal past 何必提到他的前科.