In the Warring States, there was a chef who was very skilful at killing cows. King Hui of Liang was surprised at his skill and asked: How skilful you are! How did you make it? The chef replied: At the beginning, I didn’t know the inner structure of a cow. So it often took me not only a lot of time but also great strength to kill them. Later on, I kept practising again and again. And finally I mastered the inner structure of a cow. That’s why I can do it skilfully. Now look at my knife, which I have used for nineteen years. It is still as sharp as a new one.
Hearing this, King Hui of Liang nodded with his thumb up: Nice! Nice! I am inspired a lot by your words.
3. make it：做到，做成
5. thumb up：称赞