| 释义 |
Second finger
基本例句
第二指
The thumb and the second finger can only execute their vertical motions from these points.拇指和第二指能够使他们从这些交会点垂直运动。
In birds the second finger is the principal strut of the wing, which consists primarily of feathers.而鸟类的第二指进化成为翅膀的主要支架，翅膀也主要是羽毛构成的。 |