tug

那艘小拖船正把大型油轮拉进港口。

The small ___tug is pulling the oil tanker into the harbor.

那艘小拖船正把大油轮拉进港口。

The small ___tug is pulling the large tanker into the harbor.

当他看到那张老照片时，心中涌起一股强烈的思念之情。

He felt a strong ___tug of longing when he saw that old photo.