Translate the following sentences into English.我介绍这些背景情况是因为我认为要判定一个作家的写作动机，就得对其早年的经历有所了解。作家的题材总是由他所处的时代决定的，至少在我们这个动荡不安的时代是如此。
I GIVE ALL THIS BACKGROUND INFORMATION BECAUSE I DO NOT THINK ONE CAN ASSESS A WRITER’S MOTIVES WITHOUT KNOWING SOMETHING OF HIS EARLY DEVELOPMENT. HIS SUBJECT MATTER WILL BE DETERMINED BY THE AGE HE LIVES IN-AT LEAST THIS IS TRUE IN TUMULTUOUS, REVOLUTIONARY AGES LIKE OUR OWN.
