The air around the particle heats up, but the hollow center of the beam stays cool.

粒子周围的空气受热，但光束的空心部分仍然保持原来的温度。

youdao

One way to get round this limitation is to set up a laser in mid-air, its beam sampling the molecules along its path as it returns to the source.

避免这个局限的一种方法是在两者之间放置一个激光器，它的光束在返回光源时对途径的分子进行取样。

youdao

Originally, Keeling measured the speed of light in the air samples with a laser beam.

起初，吉林用激光束测量光在这些空气样本中的传播速度。

youdao

The team of scientists blasted a Ytterbium atom suspended in air with a laser beam.

ENGADGET: Researchers capture a single atom's shadow, has implications for quantum computers

To counteract data loss, Main.net's cofounder and head scientist, Schaike Zalitsky , built on techniques used to beam cell phone calls through the noisy air.

FORBES: Technology