undo
verb
ʌnˈduː
verb
1
to
open
something
that
is
tied,
fastened
or
wrapped
解开，打开，松开〔某物〕
The
screws
can
be
undone
by
hand.
这些螺丝可以用手拧开。
undo
your
jacket/shirt/bra
etc
I
undid
the
package
carefully.
我小心地打开包裹。
2
to
try
to
remove
the
bad
effects
of
something
you
have
done
消除…的坏影响
We
cannot
undo
the
damage
of
a
lifetime
in
only
30
days.
我们不能在短短的 30 天内消除终身的伤害。
If
a
medicine
is
taken
again
too
soon,
it
may
undo
all
the
good
that
has
been
done.
如果服用一种药物时间间隔过短，可能会抵消所有已产生的药效。
3
to
remove
the
effect
of
your
previous
action
on
a
computer
[术语] 撤销〔先前的计算机指令〕
technical