I'm exhausted. I had to work until 2 o'clock this morning.
我累死了。我一直得干到今天早上2:00。
When the heart is full,, the tongue will speak.
胸有成竹,口若悬河。
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.