3 sentences

1. 我们为什么会在一艘商船上？

   wǒ​men wèi​shén​me huì zài yī sōu shāng​chuán shàng?

   Why are we on a merchant ship?

   Source: OpenSubtitles

2. 那伙海贼袭击了过往的商船。

   nà huǒ hǎi​zéi xí​jī le guò​wǎng de shāng​chuán.

   That gang of pirates attacked passing merchant ships.

   Source: Dong Chinese Dictionary

3. 海盗在公海上横行，威胁着商船的安全。

   hǎi​dào zài gōng​hǎi shàng héng​xíng, wēi​xié zhe shāng​chuán de ān​quán.

   Pirates run rampant on the high seas, threatening the safety of merchant ships.

   Source: Dong Chinese Dictionary