It was a sign. 这是个征兆.
Is that a good sign? 那算好兆头吗? She embodies everything that's good in humanity. 她集人性光辉于一身. That's an encouraging sign. 那是个令人鼓舞的讯号 It's just the tip of the iceberg. 那只是冰山一角.
This spells trouble in my book. 依我看来这是出问题了 Can't you see the writing on the wall? 难道你看不出大难临头的警告吗?