" Flanged" refers to the large cheek pads and pendulous throat sacs that some male orangutans have.

“凸缘”指的是一些雄性猩猩的大颊囊和下垂的喉囊。

And they'll put the flanged side into the water.

他会将带凸缘的一侧放入水中。

And then they have these metal poles that are kind of flanged at the bottom.

然后他有些底部有凸缘的金属杆。

They also want to let other flanged males know who might be listening in the area that they will not tolerate the presence of another male.

它还想让有“凸缘”的、可能在听的雄性猩猩知道，它不会容忍另一只雄性猩猩的存在。