研究人员在太平洋海域首次记录到了这种罕见的奥穆拉鲸。

Researchers documented the rare ___Omura whale for the first time in the Pacific Ocean.

山田先生和佐藤女士是同事，而大村先生则是他们的部门主管。

Mr. Yamada and Ms. Sato are colleagues, while Mr. ___Omura is their department head.