Hello, I'm glad to meet you. I've heard so much about you.
你好, 很高兴见到你。 久仰, 久仰。
According to Mr. Green,this is a complicated problem.
对于格林先生,这是一个复杂的问题。
Up to now, historians have assumed that calendars came into being with the advent of agriculture, for then man was faced with a real need to understand something about the seasons.