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

“凸缘”指是些大颊囊和下垂喉囊。

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

他们会将带凸缘放入水中。

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

然后他们有这些底部有凸缘金属杆。

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.

它们还想让有“凸缘”、可能在听知道，它们不会容忍另只存在。