“undulating ground”簡單造句，undulating ground造句子

1、Because of the long pipeline, the drastic undulating ground and the high investment of the water transportation in long distance, it is important to optimize the pipe work.

2、light comes from behind the mountains and shines on trees, rocks and undulating ground. Immediately, the light and shadows in different layers of the farmer's shadows and shadows change shape and position as the sun turns.