行列: formation, array, ranks (as in join the ranks of...)...
井: a well, neat, orderly...
协调: to coordinate, to harmonize, to fit together, to match (colors etc), harmonious, concerted...
哄堂大笑: the whole room roaring with laughter (idiom)...
一技之长: proficiency in a particular field (idiom), skill in a specialized area (idiom)...
中学生: middle-school student, high school student...
反面: reverse side, backside, the other side (of a problem etc), negative, bad...
体温: (body) temperature...
单打: singles (in sports)...
接连: on end, in a row, in succession...
