The fermentation curve of the selected strain of Flammulina velutipes indicates that the multiplication period is 48-96 hours.

筛选菌株的发酵曲线表明，培养48～96小时为其增殖生长期；

youdao

According to probability principle of multiplication, the survival rate was the product of retention rate at certain period and survival rate at the previous period.

根据乘法概率法则，将某一年龄段的留存率与前一年龄段的生存率相乘可得该年龄段的生存率。

youdao

To make the demonstration test even fairer, I would be happy if the demonstration to qualify for the assignment of the USD1, 000, 000 were reduced to a five-hour period and with a power multiplication ratio of at least eight times.

FORBES: E-Cat Proof Challenge: $1,000,000 is a "Clownerie"? (Updated)