Pilots can fly above a war zone and drop thousands of small wireless sensors, the size of a small pebble and costing a dollar apiece, over the terrain.

飞行员可以在战区上空飞行，在地面上扔下数千个小型无线传感器，每个传感器只有一块小鹅卵石大小，价格为1美元。

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This will create a white rectangle over the terrain surface.

这会在地形表面上建立一个白色矩形。

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We left the rough track and bumped our way over a rugged mountainous terrain.

我们驶离坎坷的小道，又颠簸过了崎岖多岩的山地。

《柯林斯英汉双解大词典》

He still moves with an effortless steadiness over the testing terrain, not a bead of sweat on his bald pate or smooth brow, both tanned a rich chestnut.

BBC: Sardinia, land and sea

Our mission, as it's planned, is to fly over some of the oldest terrain on Mars, very highly magnetized crustal material that dates back to the beginning of Mars, 4.6 billion years ago.

NPR: Revisiting the Viking Missions to Mars

That loose gait also allows Troody to walk over rough terrain, like the Troodon dinosaurs on which she is modeled.

FORBES: Dinosaur Robots For Sale