Littrow

例句：

1. 1. The astronomers were using the Littrow telescope to observe the stars.
   天文学家们正在使用利特罗望远镜观察星星。
2. 2. The Librarian of Congress is responsible for maintaining the Library of Congress's records.
   美国国会图书馆馆长负责维护国会图书馆的记录。
3. 3. The scales are used to weigh objects accurately, ensuring fairness in transactions.
   秤被用来准确称量物体，确保交易的公平性。