ineffective
adj
ˌɪnɪəˈfektɪv◄
adj
1
something
that
is
ineffective
does
not
achieve
what
it
is
intended
to
achieve
无效果的，不起作用的，不奏效的;
ineffective
in
doing
sth
The
chemical
was
almost
totally
ineffective
in
killing
the
weeds.
这种化学品除杂草几乎无效。
[+
against
]
Various
drugs
have
proved
ineffective
against
the
virus.
事实证明各种药品都对这种病毒不起作用。
an
ineffective
marketing
campaign
一场毫无成效的营销战
the
ineffectiveness
of
most
diets
大多数规定饮食的无效