4 sentences

1. 黑海里的水事实上是黑的吗？

   hēi​hǎi li de shuǐ shì​shí​shang shì hēi de ma?

   Is the water in the Black Sea actually black?

   Source: Tatoeba

2. 亚美尼亚位于黑海和里海之间。

   yà​měi​ní​yà wèi​yú hēi​hǎi hé lǐ​hǎi zhī​jiān.

   Armenia is located between the Black and the Caspian seas.

   Source: CCMatrix

3. 土耳其位于黑海和地中海之间。

   tǔ'ěr​qí wèi​yú hēi​hǎi hé dì​zhōng​hǎi zhī​jiān.

   Turkey is located between the Mediterranean Sea and the Black Sea.

   Source: CCMatrix

4. 黑海形成了伊斯坦布尔的北方边界。

   hēi​hǎi xíng chéng le yī​sī​tǎn​bù'ěr de běi​fāng biān​jiè.

   The Black Sea forms the northern boundary of Istanbul.

   Source: CCMatrix