1. The insect's antenna is bipectinated, with two rows of comb-like branches.
这种昆虫的触角是具有两排梳状分支的。
2. The bipectinated feathers of the bird help it glide through the air more efficiently.
这种鸟的具有对称二叉状分支的羽毛可以帮助它更高效地在空中滑翔。