6 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. 这可能是咖啡因中毒的征兆。

   zhè kě​néng shì kā​fēi​yīn zhòng dú de zhēng​zhào.

   This could be a sign of caffeine poisoning.

   Source: CCMatrix

3. 你所需要做的就是寻找征兆。

   nǐ suǒ xū​yào zuò de jiù​shì xún​zhǎo zhēng​zhào.

   All you have to do is look for the signs.

   Source: CCMatrix

4. 我不知道我为何没看见征兆。

   wǒ bù​zhī​dào wǒ wèi​hé méi kàn jiàn zhēng​zhào.

   I don't know why I didn't see the signs.

   Source: AI Challenger 2017

5. 其他征兆或许更隐蔽，但总是存在。

   qí​tā zhēng​zhào huò​xǔ gèng yǐn​bì, dàn zǒng​shì cún​zài.

   Other signs may be more subtle, but they are always there.

   Source: CCMatrix

6. 父母有时会担心这种混用是语言迟缓或混乱的征兆。

   fù​mǔ yǒu​shí huì dān xīn zhè​zhǒng hùn yòng shì yǔ​yán chí​huǎn huò hùn​luàn de zhēng​zhào.

   Parents sometimes worry that this mixing is a sign of language delay or confusion.

   Source: CCMatrix