Every piece of plastic ever made still exists somewhere - that's not just a fact, it's our responsibility.
It's all about trying to make something that's as complex and as true to life as possible.
文化唯物主义的主要任务是解释构成人类文化的思想和行为的相似性和差异性。
轧棉机的发明是一系列无法预见的 circumstances 的结果。