To be very close friends
Sehr gute Freunde sein (zehr gute froinde zain)
"They've been thick as thieves ever since childhood."
"Sie sind seit der Kindheit unzertrennlich." (zi zint zait der kindhait unzertrenlich)
to test the limits or performance of an AI system
Unexpected good things can occur.
to take an indirect route
to reintroduce something gradually
a promise made with sincerity and integrity
a true and final test of success