4 sentences

1. 乌云是下雨的征兆。

   wū​yún shì xià​yǔ de zhēng​zhào.

   Dark clouds are a sign of rain.

   Source: Tatoeba

2. 我觉得这是个很好的征兆。

   wǒ jué​de zhè shì gè hěn hǎo de zhēng​zhào.

   I think that's a good sign.

   Source: OpenSubtitles

3. 黑猫在一些文化中被认为是不祥的征兆。

   hēi​māo zài yī​xiē wén​huà zhōng bèi rèn​wéi shì bù​xiáng de zhēng​zhào.

   In some cultures, black cats are considered an ill omen.

   Source: Dong Chinese Dictionary

4. 这种异常的天气现象通常是大地震的征兆。

   zhè zhǒng yì​cháng de tiān​qì xiàn​xiàng tōng​cháng shì dà dì​zhèn de zhēng​zhào.

   This abnormal weather phenomenon is often a sign of a major earthquake.

   Source: Dong Chinese Dictionary