Is it going to be reinforced concrete? And then you get into all kinds of things in terms of the designs of the columns and the beams and the framing of the building and the connections.

VOA: special.2011.03.28

Sometimes we model light as beams of light, as rays of light.

有时候我们把光看成光束模型，看成光射线。

麻省理工公开课 - 固态化学导论课程节选

Their guns are equipped with a special device that emits laser beams each time a Marine pulls a trigger.

VOA: standard.2010.04.06

Dr.Craig Smith,the chief executive of Electro Optic Systems, says laser beams fired from the ground could protect astronauts and satellites by targeting space junk that travels at potentially devastating speeds.

VOA: standard.2010.07.24