人类社会生活的行为流是由存在的物质条件构成的。

To be a sailor of the world bound for all ports.

当最后一棵树被砍倒，最后一美元将失去意义。

The customer is the ultimate judge of our products, and their satisfaction is our top priority.

你必须愿意失败才能成功。

光是绘画的语言，阴影是其标点符号。