He couldn't be sure of the compass directions, but he was sure the direction this time was different from last time.

他不能确定罗盘的方向，但他可以肯定这次的方向和上次不一样。

And they found that, with the insects' innate sensing and processing equipment, they can likely sense compass direction down to just a couple degrees' of error.

他们发现， 利用昆虫天生的传感和处理设备，它们很可能可以将罗盘方向感知到只有几度的误差。

And if you see a map it's very likely you'll be given compass directions, you see them in the top left corner of the map, you see north south west east, learn them.

如果你看到一张地图，很可能试卷上会给你指南针方向，它们在地图的左上角，你可以看到北南西东，记住它们。