Cuisenaire rod

例句：

1. 1. The scientist used a Cuisenaire rod to measure the length of the rod.
   科学家使用库森奈尔杆来测量杆的长度。
2. 2. The Cuisenaire rod was used to measure the length of the rod.
   库森奈尔杆被用来测量杆的长度。
3. 3. The Cuisenaire rod was used to measure the length of the rod.
   库森奈尔杆被用来测量杆的长度。