TIL

例句：

1. 1. I'll be there until 7 o'clock.
   我七点之前会在那里。
2. 2. She has been working hard until the project is completed.
   她一直在努力工作，直到项目完成。
3. 3. We will continue until we find a solution.
   我们会继续寻找解决方案，直到找到为止。