熄灭率的英文

• extinctivity

• 熄灭:    extinct; extinguish; quench; ...
• 率:    rate; ratio; proportion
• 绝灭率:    rate of extinction
• 熄灭:    extinct; extinguish; quench; put out; die out; go out; cut-off; blank off (射线); blanking; extinction; extinguishing; cancellation
• 梯度；增灭率:    gradient