照相机在英语中被称为 "camera". 这个词源于拉丁语中的 "camera obscura"，意思是 "黑暗的房间"。照相机的原理就是将外界的光线通过镜头聚焦，投射到内部的感光材料上，从而捕捉并记录下图像。

例句：

I bought a new camera last week and I'm excited to try it out.

She's a professional photographer and uses a high-end camera to capture stunning images.

He accidentally dropped his camera and now it's broken.