沒有發酵箱在家中如何發酵？？？

It will be needed only in some place that is cold & dry, we do not really need that in Hong Kong. In summer, you just mix your dough, put it into a greased bowl, cover with plastic wrap & wait for the dough to rise. If it is really cold in winter, put the bowl in the oven together with a bowl of hot water, close the door of the oven (do not turn the oven on!) & wait for the dough to rise, if it is not too cold like recent years, just leave the bowl in the kitchen.