1. The phototimer on the camera allowed me to take a perfectly timed shot.
相机上的照相定时器让我能拍到一个完美定格的照片。

2. The phototimer is a useful tool for professional photographers to capture precise moments.
照相定时器对于专业摄影师来说是一个非常有用的工具，可以捕捉准确的瞬间。