finger-ridge count

例句：

1. 1.In this experiment, we used a finger-ridge count to measure the distance between two points.
   在这个实验中，我们使用手指脊线计数来测量两点之间的距离。
2. 2. The teacher demonstrated how to use a finger-ridge count to help children learn their numbers.
   老师演示了如何使用手指脊线计数帮助孩子们学习他们的数字。
3. 3. The child was able to count by finger-ridge count alone, without any assistance from an adult.
   这个孩子能够仅凭手指脊线计数，不需要成人的帮助。