keep
up
with
动词词组，跟得上，不落后的意思。
you
are
walking
too
fast.
i
cannot
keep
up
with
you.
你走得太快了，我跟不上你。
we have
to
work
hard
to
keep
up
with
the
pace
of
the
age.
我们必须努力，才能跟上时代的脚步。
1.(使)不停止
Rain kept up all day.
雨下了一整天。
2.保持
He kept up a correspondence with Tom.
他和汤姆保持通信联系。
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