孩子们被要求在仪式过程中坐着不动。

The children were asked to sit ___still during the ceremony.

请站好别动，我帮你调整一下麦克风。

Please stand ___still while I adjust your microphone.

模特设法在整个肖像拍摄过程中保持不动。

The model managed to stay ___still for the entire portrait session.