Mean time to failure is the average continuously operational period — i.e. the average period between the end of one failure and the beginning of the next.

平均失效到达时间是连续运行期间的平均值——也就是说，在结束一个失效和开始另外一个之间的平均周期。

youdao

The session is maintained by a container for a period of time, from the beginning of the user's access to the end of the user's last access.

从用户开始访问到用户最后一次访问结束的这段时间内，由容器对会话进行维护。

youdao

Making your new habit a regular part of your daily or weekly routine from the very beginning will give you a much greater chance of sustaining it over a longer period of time.

从一开始就让你的新习惯成为每天或每周的固定部分会让你更可能长时间维持这个习惯。

youdao

CommWarrior has been seen in the wild sporadically since the beginning of the year, but contains a sleep function that allows it to lie dormant for an undetermined period of time, which explains why it hasn't yet hit peak distribution.

ENGADGET: CommWarrior cellphone virus smolders, somewhere

The number of part-time undergraduates beginning their first year dropped by 8% in the same period.

BBC: Part-time student numbers fall at UK universities