【医】 Hager's tests
black; dark; secret; sinister; wicked
【医】 black; melano-
dagger
【化】 gray; grey
like so; you
family name; surname
experiment; test; try; try on; try out; examination; experimentation; trial
trial run
【计】 breadboarding
【医】 probation; test; tria
【经】 test; trial