youdao

It turns out that dolphins have a structure in their foreheads, just in front of their nasal sacs, called a melon.

原来，海豚额头上有一个结构，就在它们的鼻囊前面，叫做鼻瓜。

youdao

Don't tie [put on] your shoes in a melon patch or adjust your hat under a plum tree -- avoid being suspected.; Don't do anything to arouse suspicion.

瓜田不纳履， 李下不整冠。

《新英汉大辞典》

Kanevsky answered it, and, despite having no experience or credentials, persuaded Slatkin to let him create a melon-shape porcelain tureen on spec.

WSJ: Porcelain Flowers Never Die

Anyone brave enough to delve into its spells may learn how to use magic to manufacture fake gold, calm a wild horse or ripen a melon.

BBC: The Channel Islands�� surviving lore

And you only have to look under the hood or crawl beneath the car to see a technological nightmare: A low-compression flathead V-8, cloth wrapped wires, a crude carburetor, leaf springs and no shocks, big mechanical brakes that were about as useful as an anchor, and a differential the size of a melon, to appreciate that this car was a polluting, rattling, death trap.

FORBES: The Coupe Coup