key frame

例句：

1. 1. The keyframe of the animation is crucial to the story's development.
   动画的关键帧对故事情节的发展至关重要。
2. 2.In the game, you need to control the keyframes to move the characters around.
   在游戏中，你需要控制关键帧来移动角色。
3. 3.The artist carefully drew each keyframe to ensure that the animation was accurate.
   这位艺术家仔细绘制了每个关键帧，以确保动画准确无误。