triplet
名词 triplet:
the cardinal number that is the sum of one and one and one
同义词:three, 3, III, trio, threesome, tierce, leash, troika, triad, trine, trinity, ternary, ternion, tercet, terzetto, trey, deuce-ace
one of three offspring born at the same time from the same pregnancy
a set of three similar things considered as a unit