At first, Flappy bird seems easy, as it only requires players to pilot a bird past narrow pipe gaps.
《飞扬的小鸟》乍一看觉得很简单，因为玩家只需要控制一只小鸟躲避水管障碍。
2
The soil pipe in pilot room not follow and this room has not shower, to be repaired and added.
引航员房间厕所便池粪管堵塞了，该房间没有淋浴，需修理和增加。
3
This Paper conducted a pilot study by the following three areas:Firstly, pressure fluctuation experiments of UPVC single pipe, double pipe under the steady pressure condition were conducted.