A second bone lines the front of the wing, forming a leading edge, similar to an aircraft.

第二根长在翅膀前沿形成了翼前缘，与飞机类似。

This is a really exciting discovery, because it suggests that various wing forms were evolving during Jurassic.

这个发现非常令人激动，因为这表明在侏罗纪时期，各种各样的翅膀形态都在进化。