猎人追踪了野兔的脚印一整夜。

The hunter ___tracked the rabbit's footprints all night.

这个系统会追踪你的学习进度并提供反馈。

The system ___tracked your learning progress and provided feedback.

孩子们湿漉漉的鞋子在走廊上留下了一串泥泞的脚印。

The kids' wet shoes ___tracked muddy footprints down the hallway.

这辆履带式拖拉机非常适合在泥泞的田地里工作。

The ___tracked tractor is perfect for working in muddy fields.