【化】 hard processing channel black
adversity; bad; blame; difficult; disaster; hard; hardly possible
get along with; goof; mix; confuse; muddle along; pass for
chamfer; gutter
【计】 slot
【化】 channel
【医】 alvei; alveus; crib; gutter; slot; socket; tank; trough
black; dark; secret; sinister; wicked
【医】 black; melano-