The boss is waiting in his office for us to come and explain why we failed to finish this work on time.
老板在他的办公室里等着我们前去说明未能按期完成这个工作的理由。
In the beginning they used to carve Chinese characters on stones to record important dates in history.
开始时,他们常把汉字刻在石头上,记载历史上重要的日期。