The subtle code signs were all around.

微妙的代码标志无处不在。

She opened it, saw the Duke's handwriting and code signs, scanned it.

她打开它，看到了公爵的笔迹和暗号，扫了一眼。

And by the 1980s and 1990s discussions about housing projects began to use language about race and crime as coded signs that the projects themselves were failures.

到了20世纪80年代和90年代，关于住房项目的讨论开始使用关于种族和犯罪的语言作为项目本身失败的标志。