Hydrogen peroxide or causticsoda can also be used to kill bacteria, but it pollutes the water and harms plants, says ms Mehra.
按梅菈的说法，虽然可用双氧水和苛性钠杀菌，但这会造成水质污染并对植物有害。
2
Some of the color usually stays on while its in the causticsoda, but it wipes right off.
一些通常的颜色，而停留在其在烧碱，但马上擦拭。
3
The experiments demonstrate that this is a new method of production, It will in a certain sense improve the process of manufacturing pure sodium and causticsoda.