They be.他们是。theypron.他们They are rival in study.他们在学习上是竞争对手。They eat with big bowls.他们吃大碗。They own the skies here.他们拥有天空这里。They are very beautiful.它们真漂亮。They took a quick train.他们乘坐快车。They wallowed in luxury.他们沉溺于奢侈的生活中。They rode out the storm.他们安然渡过风暴。They were striking camp.他们在拔营。They are washing dishes.他们正在洗碗盘。They swam all afternoon.他们游泳游了一个下午。