n.（供训练时穿的）保暖宽松的长袖运动衣裤，田径服( tracksuit的名词复数 )...

tracksuits的音标：...

They were decked out in tracksuits, seemingly to dissimulate their true function.他们都穿着田径服，似乎想掩饰他们的真实职能。For tracksuits you need material with plenty of stretch.做田径服需要用弹性强的料子....