If both feet leave the ground, it's running!

如果双脚都离地了，那就是跑步！

Some of the kids have even started leaving the grounds during school time.

有些学生甚至开始在上学期间逃课。

" But how do you keep...them...from wandering off...from leaving the grounds? "

“但你们如何阻止......他们......走失......游荡到庄园外面？”

If that plane leaves the ground and you're not with him, you'll regret it.

如果飞机离地而你不在上面，你会后悔的。

" Takeoff" (takeoff) is when the plane leaves the ground.

“起飞”（takeoff）是飞机离开地面的时候。

Did all four of a horse’s legs leave the ground in a gallop?

马的四条腿在疾驰时是否都离地了？

This upward push of air, called lift, causes a plane to leave the ground and fly.

这种向上的空气推动力，称为升力，使飞机离开地面并飞行。

When an insecure dog owner approaches an unfamiliar dog, the owner might pull back on the leash, causing the dog's front legs to leave the ground.

当一只缺乏安全感的狗主人接近一个不熟悉的狗时，他可能会向后拉绳子，使狗的前腿离开地面。

Struggling, terrified, he heard more clicking, and saw Ron's legs leave the ground, too, heard Fang whimpering and howling—next moment, he was being swept away into the dark trees.

他挣扎着，极度惊恐，这时又听见了咔哒咔哒声，他看见罗恩的双腿也离开了地面，还听见牙牙在哀鸣、咆哮——接着，它就被拖进了漆黑的树丛。

It's all happened so quickly that now, knees curled up to his chin as they leave the ground, is the first time Alex is able to actually think about everything.

这一切发生得太快了， 现在，当膝盖离开地面时，亚历克斯第一次能够真正思考一切。

As we leave the grounds notice the moat once much deeper and filled with water from the river, the depth and near vertical incline making it very difficult for would-be attackers.

当我们离开场地时， 注意到护城河曾经更深且充满了河水，其深度和近乎垂直的坡度使得攻击者很难进攻。

It's true that the dodo's small wings wouldn't have allowed it to leave the ground, but the scientists suggest that these were probably employed for balance while going over uneven ground.

渡渡鸟的小翅膀确实不允许它离开地面，但科学家们认为它们可能是用来在不平坦的地面上保持平衡的。

Before a new aircraft ever leaves the ground, manufacturers put the model through tons of tests that look at things like extreme heat and cold, high winds, excess water, ice, and lightning strikes.

在一架新飞机离开地面之前， 制造商会对该模型进行大量测试，这些测试着眼于极端高温和寒冷、大风、过量水、冰和雷击等情况。

If you are " snowed in" you are unable to leave the airport because it is snowing so much the planes can't take off or land;they can't leave the ground because there's too much snow.

如果你被“下雪” 了，你就不能离开机场， 因为下雪太大了， 飞机不能起飞或降落； 他们不能离开地面， 因为雪太多了。

According to her research, runners hit the ground with as much as four times their body weight per step, while race walkers, who do not leave the ground, create only about 1.4 times their body weight with each step.

根据她的研究，跑步者每踏一步的压力就高达其自身体重的4倍，而没有离开地面的竞走者每步仅产生其自身体重的1.4倍的压力。

And then the next thing you wanna do is like, basically, if you leave the grounds just centered in the cup like that in a little mountain, when you press them down, they're not gonna distribute evenly across the cup.

- 然后你想做的下一件事就是，基本上，如果你让咖啡渣像在一座小山上那样位于杯子的中心，当你按下它们时， 它们不会均匀地分布在杯子上。