2 sentences

1. 早晨天上呈红色据说是坏天气的预兆。

   zǎo​chen tiān​shàng chéng hóng​sè jù​shuō shì huài tiān​qì de yù​zhào.

   A red sky in the morning is said to be a sign of bad weather.

   Source: UM-Corpus: Education

2. 从后面看到一只黑猫是一个不好的预兆。

   cóng hòu​miàn kàn dào yī zhī hēi​māo shì yī​ge bù​hǎo de yù​zhào.

   Seeing a black cat from behind is a bad omen.

   Source: CCMatrix