act up to
put into practice；behave in such a way that one's actions are in accord with（expectations，a promise，one's reputation，etc．）按照（期望、诺言、自己的声誉等）行事
What you say means very little unless you act up to it．你要是说而不做，你的话就没有多大意思了。
I hope you'll act up to the good advice they've given you．我希望你能按照他们给你出的好主意办。