相机而动，汉语成语，拼音是xiàng jī ér dòng，意思是观察时机，看到适当机会立即行动。出自《左传·隐公十一年》。
但事实上林光如却一直在仔细地观察着内地市场的每个细微变化，相机而动。
But in fact forest light has been carefully watched mainland market changes in the least, the camera.
此拳的风格特点是以柔而刚为主、以刚而柔为妙，遇敌则相机而动，刚柔相济，虚实并进。
The characteristics of this style of boxing are: move as the situation changes when confronting with the enemy, alternate softness with hardness, and move forward.
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