During the harbor tour, our guide pointed out a cob circling above the fishing boats.

港口導覽時，導遊指著一隻在漁船上方盤旋的大黑背鷗給我們看。

The shipping office reported that a cob had nested on top of container stack B.

航運辦公室回報，有一隻大黑背鷗在B區貨櫃堆頂端築巢。

Guests at the seaside hotel complained that a cob kept stealing food from the terrace.

海邊飯店的房客抱怨，有隻大黑背鷗一直偷吃露台上的食物。