It means: What you say is not as good as what you do. When you say you do it, you must take action.

Similar sentences:

1. A thousand mouth gestures cannot equal one hand gesture.

2. Bats dare not see the sun, so they say there is no sun in the world.

3. Just listen to the sound of the stairs, but no one comes down. No matter how many horses and bells there are, they can't help pull the cart.

4. One hundred times of empty talk is not as good as one time of hard work; one hundred times of yearning is not as good as one time of climbing.

5. Being able to speak is not as good as being able to listen, and being able to listen is not as good as being able to act.

There are many proverbs like this. They are similar to idioms, but they are colloquial and easy to understand. They generally express a complete meaning and are almost always one or two short sentences in form.

The differences between action and practice are:

1. Different references

Action: refers to activities carried out to achieve a certain purpose.

Activity: refers to the movement of objects and people.

2. Different explanations

1. Action

① Walk around.

② Activities carried out to achieve a certain purpose also refer to activities.

③Action, action, behavior.

2. Activities

①Objects and people move.

② Refers to conspiracy, intercession, and bribery.

③Action with a certain purpose.

④Function.

⑤ wavering, unstable.