squad
/skwɒd/noun
treated as sing. or pl.
1- a small group of people having a particular task（特种）小分队, 小组：
an assassination squad.
一个暗杀小组。
1.1
- a small number of soldiers assembled for drill or assigned to some special task（军队里的）班, 组。
1.2
- a group of sports players or competitors from which a team is chosen候选运动员：
Ireland's World Cup squad.
爱尔兰备战世界杯的球员。
1.3
- a division of a police force dealing with a particular crime or type of crime（警方）专案组：
the regional crime squad.
对付地区犯罪的专案组。
词源
mid 17th cent.: shortening of French escouade, variant of escadre, from Italian squadra 'square'.