Understanding the concept of recursion is an important skill in programming.

You should protect your own health.

A verb plays the role of expressing actions or states in a sentence.

Your application is not covered.

He is using that coat from winter to spring.

You need to use your head to solve this problem.

This program has recursivity.

This problem can be solved with a recursive approach.

He used himself as a reflexive pronoun.

Understanding the algorithm of the regression tree is difficult.