aperture

• 名词，指孔、洞或缝隙，可以是天然的、人造的，或指光学仪器中控制光线通过的装置。

A noun referring to an opening, hole, or gap, which can be natural, man-made, or a device that regulates the passage of light, especially in optical instruments.

1. Light control deviceB2formaltechnical

   A mechanism, typically in a camera or optical instrument, that regulates the amount of light passing through a lens.

   光圈

   • The photographer adjusted the aperture to let in more light.
   • A wider aperture creates a shallower depth of field.
   • The camera's aperture is controlled by a ring on the lens.

   同义词diaphragmirisstop

2. Natural openingC1formalscientific

   An opening or gap that occurs naturally in a structure or organism.

   自然开口

   • The cave's aperture was barely wide enough to enter.
   • The aperture in the rock face led to a hidden chamber.
   • The nasal aperture is part of the human skull.

   同义词cleftfissuregapholeopeningorificeporeslitvent

3. Small man-made openingB2formaltechnical

   A small, often deliberate opening created in a surface or object, typically for a specific purpose.

   小孔

   • The aperture in the wall allowed a thin stream of light to enter.
   • The device has a small aperture for inserting a cable.
   • The aperture in the door was used for passing documents through.

   同义词holeopeningorificeportslitslotvent