Definition
To instruct someone to remain still and not move.
（用以告知某人）不要移動。
You have to hold still so I can take a good picture of you.
你必須保持不動，這樣我才能幫你拍張好照片。
Please hold still, the doctor needs to examine your wound.
請保持不動，醫生需要檢查你的傷口。
Kid, please hold still, I'm measuring your height.
孩子，請保持不動，我在量你的身高。