The sign reads 是一种惯用说法,后面跟标牌上面的内容.
例如:The sign reads NO LITTERING everywhere we go around the Expo zone.
The sign reads "Notice:this beach area may not be suitable for swimming due to high levels of bacteria".
上面的文章因为通篇是过去时,所以要说There was also a sign next to the mirror that read,...