试题题干
Translate the following sentence into Chinese.
They saw that the human race had only one world to live in, and that unless it managed its affairs more prudently, all human beings might perish.
参考答案
试题解析
考点：the human race人类；unless 如果不；manage affairs处理事务；prudently谨慎地；perish灭亡。
句子结构：主句为They saw，that引导宾语从句解释saw的内容。unless引导条件状语从句。