The cat is alert to every sound and movement.

那只猫对任何响动都很警觉。

《新英汉大辞典》

A sparse and straightforward ’Options’ dialogue allows you to set the refresh interval, pick an animation, set the sound alert and choose whether the application runs on start-up.

简单明了的“选项”对话框允许您设置刷新间隔，选择你想用的动画，设置提醒时的声音，以及选择是否在开机时启动程序。

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The more sound samples you intend to process per notification, the more powerful your hardware should be to reduce the time spent synthesizing your alert sounds.

每个通知要处理的声音采样越多，硬件的处理能力就应该越强，这样才能减少合成提醒声音所用的时间。

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They still have the original bench at which the founder, Joseph Hudson, made the very first police whistle in the 1880s, replacing wooden rattles that the "peelers" had previously used to sound the alert.

BBC: Company whistles through history

An editorial in Beijing's Global Times says Japan has highlighted the radar incident "to sound an alert" between the Chinese and Japanese public.

BBC: Japan Maritime Self-Defense Force destroyer Yuudachi

Consumers can still expect the test to look and sound very similar to the local tests of the Emergency Alert System that are already conducted frequently in local markets on TV and radio.

FORBES: Will Right-Wing Radio Skip The National Emergency Test?