Needless to say he is the best, he is the greatest leader.

The summer vacation ended in the blink of an eye.

It's hard to say, but I think you're wrong.

He always used to say, 'It's easy to say, but hard to do.'

He is good at expressing his feelings well.

He is an expert in ethology, and his research is highly regarded worldwide.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.

His speech was a double negative, making it difficult to understand.

That plan is too impractical, it's difficult to implement.

There are no words to describe that beauty.