draw back
1．move backwards；withdraw后退
The crowd drew back to let the firemen through．人群向后退去，给消防队员让出一条路。
The children drew back from the dog when it barked at them．孩子们当狗冲着他们叫的时候退了回来。
2．be unwilling to fulfill不愿履行
The firm has drawn back from its promise．这家公司收回了承诺。