dà / jiā / dōu / xiǎng / zhī / dào / zhè / fēng / nì / míng / yóu / jiàn / de / fā / jiàn / rén / jū / xīn / hé / zài

大家都想知道，这封匿名邮件的发件人居心何在。

Everyone wanted to know what the sender of the anonymous email was really trying to do.