Dark stripes alternate with pale ones.

深浅条纹相间。

Wet days alternate with fine days.

雨天和晴天相间而来。

The soft days alternate with fine days.

下雨天和晴天交替而来。

Every second square to alternate with the above design.

以上图案每两个方块交替一次。

Due to the heavy workload, they decide to alternate with the work.

因为工作量很大，他们决定轮流做。