Black-box testing is a method of software testing where the internal structure and implementation details of the system being tested are not known to the tester.

Black-footed cats are small wild cats native to southern Africa.

The black-footed cat is a small wildcat species native to southern Africa.

Black-handed gibbons are highly agile primates.

The black-handed gibbon swung gracefully through the trees.

Black-tailed jackrabbits are commonly found in the desert regions of North America.

The black-tailed jackrabbit is a species of hare native to North America.

The black-billed capercaillie is a rare bird found only in Siberia.

She may seem strict, but she's not as black as one is painted.

She wore a little black dress to the party.