有错误,in other words,后面不能直接加从句,还有前面介词可以改下更好,句子可以改为 The most fundamental fear for people are unknown things,in other words,things which expose their ignorance directly.which是接上一句的从句的这样说不对啊，in other words, 后面的不跟跟前面的部分是同位语关系哦