A signal is an event, and it's used to alert a process.
信号是一个事件，它被用来向某个进程发出警报。
In some cases, a sound alert has advantages even for those without a visual impairment.
在某种情况下，对于那些没有视力障碍的人也有优势。
Now I want you to relax and, at the same time get a little bit alert for a change.
大家放松一下，不过同时，也要机灵点，变化来了。
An Alert object represents a modal dialog box to display a message.
Alert对象表示一个显示消息的模态对话框。
Alert is a function invocation, with a single string as a parameter.
alert是个函数调用，只有一个字符串作为参数。
With the push of a button, a person is able to alert the medical staff of an emergency situation.
在紧急情况下，他们只需要按下按钮，就能及时通知医护人员。
You can supply a custom alert sound, or you can use a built-in alert sound.
你可以提供一个自定义警告声音，也可以使用内置的警告声。
An alert pharmacist will save a doctor from his own mistake by querying a prescription.
警惕性很高的药剂师对处方提出疑问而避免了医生的错误。
Aware, like a fox crossing the water. alert, like a general on the battlefield.
达明兮若渡水狐；机警兮若战场上的将；
She was a woman with a normally brisk manner and alert, penetrating eyes.
她是一个举止轻快，两眼炯炯有神的妇女。
Then all of a sudden he perked up, alert, "like a meerkat".
然后又突然高喊“就像猫鼬”。
Then all of a sudden he perked up, alert, "like a meerkat".
然后又突然高喊“就像猫鼬”。
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