4 sentences

1. 随着年龄的增长，你的牙齿会变黑。

   suí​zhe nián​líng de zēng​zhǎng, nǐ de yá​chǐ huì biàn​hēi.

   As you age, your teeth will become darker.

   Source: CCMatrix

2. 房间开始变黑了，但我不敢打开灯。

   fáng​jiān kāi​shǐ biàn​hēi le, dàn wǒ bù​gǎn dǎ kāi dēng.

   The room began to grow dark, but I didn’t dare turn on a light.

   Source: CCMatrix

3. 如果香蕉储存在12℃以下，它们会变黑并腐烂。

   rú​guǒ xiāng​jiāo chǔ​cún zài12℃ yǐ​xià, tā​men huì biàn​hēi bìng fǔ​làn.

   If bananas are stored below 12 ℃, they will turn black and rot.

   Source: CCMatrix

4. 如果可能的话，用遮光窗帘使你的房间在晚上变黑。

   rú​guǒ kě​néng de​huà, yòng zhē​guāng chuāng​lián shǐ nǐ de fáng​jiān zài wǎn​shang biàn​hēi.

   If possible, use blackout curtains to make your room dark at night.

   Source: CCMatrix