spread的过去式 spread；过去分词 spread；
spreadv.展开；打开；摊开；使散开
The disease is spreading at a rapid rate.
这种疾病正在迅速蔓延。
They took active steps to prevent the spread of the disease.
他们采取积极措施，防止疾病蔓延。
Use of computers spread rapidly during that period.
在那个时期，计算机的应用迅速流传开来。
