Zhè / sōu / bǔ / jīng / chuán / yǐ / jīng / zài / Běi / Tài / píng / yáng / shàng / háng / xíng / le / sān / gè / yuè。

这艘捕鲸船已经在北太平洋上航行了三个月。

This whaling vessel has been operating in the North Pacific for three months.