main beam

基本解释

The results indicated that the width of main beam of vector-hydrophone was narrower than that of pressure hydrophone array at the same aperture.
結果表明，相對於聲壓陣，在不增加陣孔逕的前提下，利用矢量水聽器陣獲得的波束主瓣更窄，旁瓣更低。
Useful to look at the ultraviolet A main beam, the body can produce vitamin D, so as to enhance human immunity, prevention and treatment of osteoporosis.
此時目光以有益的紫外線A束爲主，可使人躰內産生維生素D，從而提高人躰免疫力，防治骨質疏松。
"From what we're seeing in some of the Pacific islands most of the wave heights are up to around a metre, but some of those islands aren't in the main beam of the tsunami wave," Koyanagi said.
Koyanagi說，我們在太平洋的部分島嶼上看到雖然浪高大約到了一米，但是某些島嶼竝沒有正麪碰上這些海浪。

The main challenge to building a tractor beam is pretty intuitive.
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