persevere at

英 [ˌpɜːsɪ'vɪə(r) ət] 美 [ˌpɜːrsə'vɪr ət]

• persevere in/with坚持； 不屈不挠

persevere at的用法和样例：

例句

1. Never was anything at once so frail and so indomitable.
   从来没有什么东西象这样既纤弱又不屈不挠。
2. Cawperwood looked at his wife with unflinching eyes.
   柯柏乌以不屈不挠的眼光望着他的太太。