hold/stand firm idiom
呆在原地；坚持不动；保持不变
to remain in the same place or at the same level
The protesters stood firm as the police tried to disperse them. 警察试图驱散示威者，但他们坚守阵地，一动不动。
The dollar held firm against the Euro today. 今天美元对欧元的汇价坚挺。