How the JTAC team was observing the trucks was not clear, but many aircraft have infrared video cameras that can send a live feed to a computer monitor on the ground.

联合终端攻击控制器小组是怎样观测到卡车的过程并不清楚，但许多飞机上都有红外摄像仪，能将地面活物的图像发射到电脑监视器上。

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Likewise, the giant sequoia redwoods of coastal California rely on periodic fires to thin out the competition and clear the ground and canopy ready for new growth.

同样，加利福尼亚沿岸的红杉林也依靠周期性的火灾来减少物种间的竞争，并为植物的新生清理地面和树荫。

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Set some ground rules: Set a social media policy for your organization, so it’s clear how to respond to what you’re hearing - and what types of initiatives have internal support.

设定一些基本的规则：为你的组织设定一些社会媒体的基本策略，以便清晰回应你听到的，并且这种方案已经获得内部支持。

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Today,VOA broadcasts to satellites in space that send the signal back to stations on the ground that transmit programs with a clear signal.

VOA: special.2010.12.08

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

Fire is the cheapest and fastest way to clear the ground of misshaped and scrubby trees, together with undergrowth.

ECONOMIST: When the smoke clears in Asia

It is not known at this stage how the fire started, but swailing - a controlled burning of overgrown heathland to clear the ground and encourage new growth - can with prior approval be carried out on the moor until the second week of April.

BBC: Massive gorse blaze near Okehampton

Between entering the top of the atmosphere and touching down, the lander had seven minutes to reach Gale Crater, find clear ground, and deposit the one-ton rover, with only an onboard computer to guide it.

NEWYORKER: The Martian Chroniclers