局外人

jú wài rén nán yǐ dé zhī

局外人难以得知。

There is no way outsiders can find out.

tā men jué de zì jǐ shì jú wài rén

他们觉得自己是局外人。

They feel like outsiders.

duì jú wài rén lái shuō zhè tào tǐ xì sì hū fù zá nán dǒng

对局外人来说﹐这套体系似乎复杂难懂。

To an outsider, the system seems complex and confusing.