穿梭 (chuān suō): เพื่อเดินทางไปมา

In the subway station in the early morning, people hurried back and forth, rushing to work.

Couriers ride electric bikes back and forth through streets and alleys every day, delivering packages to customers.

Small fish swim back and forth freely among the coral reefs, as if playing hide-and-seek.

He frequently travels back and forth between Beijing and Shanghai to handle company business.

At night, fireflies flit back and forth through the woods, emitting little specks of light.