the preferred approach is to use a timer circuit that can independently count precise time increments and generate an interrupt after a preset time has elapsed.
首选的办法是使用一个定时器电路,可以独立的计数确切时间的递增,并产生一个中断后。
the stopwatch, which counts backwards, emits a signal tone after a preset time has elapsed.
秒表,这倒计数,预设时间后,会发出一个信号音都过去了。
new software is automatically downloaded and overwrites the existing software at a preset time (default time is 3 am).
新软件是自动下载并改写现有的软件,在预设时间(默认的时间是凌晨三时) 。
so, at the preset time i do not know when i will arrive in, or leave, japan nor do i have a hotel reservation.
因此,目前我尚不知道什么时候能到达和离开日本,亦没预定旅馆。
this program will switch off your phone at the preset time and after a user-defined inactivity period.
这一计划将关掉您的手机在预设时间后,用户定义的閑置期。
the memory aid comprises a timing module, a corresponding display screen and corresponding operation keys thereof and can set preset time within 24 hours for a single time or many times randomly;