KTFR

例句：

1. 1. This is the key to unlocking the door.
   这是打开这扇门的钥匙。
2. 2. The KTFR is a popular tool for organizing and managing tasks.
   KTFR是一种受欢迎的工具，用于组织和管理任务。
3. 3. The KTFR has helped me save time and improve efficiency.
   KTFR帮助我节省了时间并提高了效率。