是too不是to，中文意思是，adv. 此外，而且也，同样

例如

硫磺也用来给设备消毒。Sulphur is also used to sterilize equipment.

他也赞成与西方共存。He also believed in coexistence with the West.

政治气氛也明显升温。There's also been a noticeable rise in the political temperature.