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

Using a laser, the robot can make highly accurate welds and position itself for each one a lot faster than it could if it were spot-welding in the normal way.

与传统方法相比，利用激光，机器人可以高精度高效率的完成焊接。

youdao

In the scheme the ion is excited by two laser fields tuned to the first lower and higher vibrational sidebands, and then by one laser tuned to the ion transition in an alternative way.

在本方案中，这个离子受到两个分别调到第一高、低振动边带的激光场和一个与离子共振的激光场的轮流激发。

youdao

The successful transmission is a significant achievement -- which Renaissance painter Leonardo da Vinci would have surely appreciated -- because it marks "the first time anyone has achieved one-way laser communication at planetary distances, " said principal investigator David Smith of the Massachusetts Institute of Technology.

CNN: SHARE THIS

This marks the longest one-way communication via laser, as the light made its way across the 240, 000 miles between the Earth and Moon.

FORBES: NASA Uses Lasers To Send The Mona Lisa To The Moon