at the point of death

On the point of resignation; at the point of death.

正要辞职之时；死亡之时。

That poor man was at the point of death.

那个可怜的人快要死了.

The growth of pH ranged from 5 to 9, with an optimum 6.5& 7.5.The thermal death point of conidiospores tested in the hot water was at 52 ℃ for 10 min.

在pH59范围内均可生长，以pH6.57.5为最适。湿热致死温度，分生孢子为52℃，10分钟；

And the analog data of the concentration in a certain points over time by FLUENT is introduced the probability function on the consequences of toxic leak, we can get the probability of individual death at a point by integral on concentration and time.

并将FLUENT软件在某点处浓度随时间变化的模拟数据引入毒物泄漏后果的概率函数法，进行浓度与时间的积分得到某点处引起个体死亡的概率。