keep a slack hand

例句：

1. 1. The team kept their winning streak alive.
   队伍保持了他们的连胜纪录。
2. 2. She kept her promise to help me with the project.
   她答应帮我完成这个项目。
3. 3. The company keeps its headquarters in New York City.
   该公司总部设在纽约市。