The field of view can be limited by inserting a stop in the focal plane of microscope.

可以在显微镜的焦平面上加装一光阑，从而限制视区。

youdao

The process of vessel element ' s promotion, formation and connection in primary xylem of antirrhinum majus, a model plant, was observed through micropolariscope and bright - field microscope.

利用偏光显微镜和明场显微镜，首次报道了模式植物金鱼草幼苗初生维管系统木质部导管分子的发育、形成和连接过程。

youdao

A lot of submicro copper particles give a golden scattering light with slight pink hue in the dark field of optical microscope and a greyish red colour in visual observation.

无数的亚显微铜粒在暗场显微镜下呈金黄色散射并略带微红色调，肉眼观察则呈灰红色。

youdao

Also, such lasers can scan a much broader field of view than a laser in a digital microscope.

FORBES: Magazine Article

Once-upon-a-laugh-track, many brands kept the humor strictly off camera, but Brand Keys has put one of those categories under the research microscope to see how humor is working in a field once thought far too serious to put in the hands of comedy: Car Insurance.

FORBES: 'Four Car Insurance Brands Drive Into a Bar'