未沸 meaning in English

at a simmer

Minimum temperature of the water when it is in contact with tea leaves is simmering ( 85 , or 185 ? ) , and at this temperature ( which should be maintained for the entire period of extraction ) the time required to steep tea is 6 to 7 minutes
水与茶叶接触时水的最低温度是将沸未沸的温度( 85或185 ? ) ,在此温度(整个萃取过程应始终维持此此温度)下，泡茶的时间需要6 ~ 7分钟。