He moved on through wet grass that soaked his trouser legs.他继续前行，穿过湿漉漉的草地，裤腿全湿透了。She wore a lime-green trouser suit.她穿着一身暗黄绿色的衣裤套装。...a mannish trouser suit.一套颇男性化的长裤套装He hiked up his trouser legs...他提起裤腿。He hiked up his...
绘图技术取决于观测者的能力.The technique of the drawing depends on the ability of the observer.对于观测者特别重要的是明暗界线的位置.Of particular importance to the observer is the position of the terminator.观测者要对大气条件作详细记录.The observer should always ma...