与摄影器材、舞台灯光类似，它属于活动经济的一部分，而活动经济本身具有明显的淡旺季波动。只要旺季结束，设备闲置率就会上升。
Back in 2007, Seattle welcomed a new streetcar line with a similarly sexual moniker — an acronym of the South Lake Union Trolley.，更多细节参见搜狗输入法下载
Objects have a class, and a fixed size based on their class.，详情可参考Line官方版本下载
СюжетНаселение России: