Avoiding obstacles on the ground, but also in the air.

不仅要避开地上障，还得留意空中。

The second stumbling block has been bad luck.

第二个障可归结为接踵而来霉运。

Farmers plant these barriers around their fields.

农民在农田周围种上这些障。

And check the width of the space as well as any possible obstruction.

检查距离够不够宽，以及路上有没有障。

If an obstacle is detected, the stick warns the user by vibration.

如果检测到障，棍子通过振动警告用户。

If we had a barrier they wouldn't be able to make that turn.

如果们有障，他们就不能转弯了。

And the wheels have artificialintelligence–they can sense obstructions and potholes in the road.

能识别障和道路坑洼。

What about short bursts to a location we can see with no obstacles in between?

那么短距离冲刺到一个就在眼前，路上还没有障地方又如何呢？

Now, he thought, I must think about the drag.

现在，他想，该考虑考虑那在水里拖着障了。

Do I have any airspace where obstacles in front of me.

前面障地方有空域吗？

Right, as long as there's nothing in the way, like trees or buildings.

没错，只要没有树或建筑等障阻挡着，你就能看清那么远东西。

Second, each adjusted his speed, depending on his distance from such obstacles.

第二，每个人都会调整自己速度，这个依赖于与障距离。

And they need to deal with whatever obstacles lie along their flight paths.

同时它们还得处理飞行路线上所有障。

He supposed he should have known better; the Reductor Curse was for solid objects.

哈利心想他早该想到这一点，粉碎咒是用来对付固体障。

When wind flows over an obstacle, like a large bump of sand, it speeds up.

当风越过障时，比如一大块沙子，它会加速。

Authorities have dismantled tents and removed obstructions at railway tracks near the camp.

官方人士将该营地附近铁轨周围帐篷及障进行了拆散和清理。

Owners and dogs move in tandem step by step, navigating obstacles, including cars.

狗和它主人一步一步地前进，通过像汽车这样障。

They have also closed off the bridges over the River Tigris with concrete barriers.

他们还用混凝土障封锁了底格里斯河上桥梁。

The flow stopped before the barriers were built.

在障建成之前，熔岩就停止了流动。

The competition involves riding horses that tow skiers by rope over jumps and around barriers.

这项比赛包括骑马，用绳子拖着滑雪者越过跳台和绕过障。