The spacecraft were too far from any ground station to send clear messages.

VOA: special.2009.07.01

He learned all there was To learn about not launching out too soon And so not carrying the tree away clear to the ground.

直到他再没有用武之地，他学会了,所有的花招：不立刻腾身跳出去,免得一下子把树干扳到了地面。

耶鲁公开课 - 现代诗歌课程节选

If you want to know something like when do you hit the ground, I think it's fairly clear what you have to do.

如果你想知道车子何时落地,我想你该做什么就很明显了

耶鲁公开课 - 基础物理课程节选

The powered parachute can fly very low to the ground, and as slowly as giving officers a clear view during search and surveillance operations.

VOA: standard.2010.01.01

I think it's clear, the position of the object with respect to the ground, this vector is the same as the position of the object with respect to the plane, plus the position of the plane with respect to the ground.

我觉得很明显,物体相对于地面的位置,这个矢量等于,物体相对于平面的位置矢量,加上物体相对于地面的位置矢量

耶鲁公开课 - 基础物理课程节选

President Obama said he will continue to seek common ground and listen to serious proposals, but made clear he will have little patience for continuing distortions.

VOA: standard.2009.09.10