Assertion: penguin's layer | /r/Synonym | blubber
Facets:
Source sentences:
text: Penguins have a layer of fat under their skin called "blubber".
text: The fat layer is also known as blubber which is quite thick and benefits the penguins in remaining warm in the thrilling circumstances.
text: The fat layer (also called blubber) is several centimeters thick and helps penguins in staying warm, even in extreme conditions.