孩子们很难长时间保持不动。
Children find it difficult to stay still for very long.
▼点击显示答案
解释
still 在这里是形容词，意思是"静止的、不动的"，描述保持不移动的状态。
Children find it difficult to stay still for very long.
still 在这里是形容词，意思是"静止的、不动的"，描述保持不移动的状态。