更改

Over time, the number of those infected fluctuates by: the specified rate of recovery, represented by <math>\mu</math> but deducted to one over the average infectious period <math>{1\over \tau}</math>, the numbered of infectious individuals, <math>I</math>, and the change in time, <math>\Delta t</math>.

Over time, the number of those infected fluctuates by: the specified rate of recovery, represented by <math>\mu</math> but deducted to one over the average infectious period <math>{1\over \tau}</math>, the numbered of infectious individuals, <math>I</math>, and the change in time, <math>\Delta t</math>.

随着时间的推移，感染人数的波动幅度为: 以<math>\mu</math>来表示特定的恢复率，移除的平均感染期记为<math>{1\over \tau}</math>，感染个体的数量 <math>I</math>，以及时间的变化<math>\Delta t</math>。

随着时间的推移，感染人数的波动幅度为：以 <math>\mu</math> 来表示特定的恢复率，但在平均感染期 <math>{1\over \tau}</math> 内减为1，感染个体的数量为 <math>I</math>，以及时间的变化为 <math>\Delta t</math>。

=====感染时期=====

=====感染时期=====

Whether a population will be overcome by a pandemic, with regards to the SIR model, is dependent on the value of <math>R_0</math> or the "average people infected by an infected individual."

Whether a population will be overcome by a pandemic, with regards to the SIR model, is dependent on the value of <math>R_0</math> or the "average people infected by an infected individual."

就 SIR 模型而言，被流行病感染的人口数量，取决于数学<math>R_0</math>基本传染数的数值，是指被感染个体能感染普通人群的人数。比如<math>R_0 = 3</math>，意味着一个感染者平均感染3个未感染者。

就 SIR 模型而言，被流行病感染的人口数量，取决于 <math>R_0</math> 的数值，或“被感染个体所感染的平均人数”。

: <math>R_0 = \beta\tau = {\beta\over\mu}</math>

: <math>R_0 = \beta\tau = {\beta\over\mu}</math>