" To hit the shutter button" and " holding the camera at arm's length" . Okay.

“按下快门按钮”和“与相机保持一定距离”。

For example, I looked at these and I picked out these words: photography, to shoot, self-portrait, shutter button, the camera.

例如，我看文章并挑选了这些单词：摄影，拍摄，自拍，快门键，相机。

Sometimes, you're looking up for two or three words because " shutter button" doesn't come up in Google dictionary and in many dictionaries.

有时候，你要查两到三个单词因为“快门按键”在谷歌字典和很多字典里都找不到。

So when I hit the shutter button, it's like pulling back a curtain to let the light come in and hit the eye?

所以当我按下快门按钮时，就像拉开窗帘让光线照进眼睛？

When you press the shutter button, the shutter opens, allowing the light to stream through the aperture of the camera's lens to the camera's eye.

当你按下快门按钮时，快门打开，让光线通过相机镜头的光圈进入相机眼。

Well, the detective turned out to be a gangster and the suspect turned out to be his ex-wife and the camera turned out to be a concealed shotgun, firing via the shutter button.

嗯，原来侦探是一个歹徒，嫌疑人是他的前妻，相机是一支隐蔽的猎枪，通过快门按钮发射。