To that end,the internal tours of the 3.15-acre structure -- which were started in late 1999 -- allow visitors to see not only the different ecosystems but also the living quarters,uniforms and other gear of the original Biospherians,as they are called.

• 因此，始于1999年末期的达3.；15英亩的内部旅游不仅允许游客们观看不同的生态系统，而且他们还可以看到生活区、工作服以及第一批生活在生物圈2号中的人们所穿的各种服装。