2 sentences

1. 这艘轮船正缓缓驶过渤海海面。

   zhè sōu lún​chuán zhèng huǎn​huǎn shǐ guò Bó Hǎi hǎi​miàn.

   The steamship is slowly sailing across the Bohai Sea.

   Source: Dong Chinese Dictionary

2. 渤海曾是东北地区的一个重要古代王国。

   Bó​hǎi céng shì Dōng​běi dì​qū de yī gè zhòng​yào gǔ​dài wáng​guó.

   Balhae was once an important ancient kingdom in Northeast Asia.

   Source: Dong Chinese Dictionary