The loop including line 3 of the listing is working through the keys received, getting a corresponding value, and printing it as an array or a string.

包含清单第3行的循环将遍历接收到的键，获得相应值，并把它作为数组或字符串输出。

youdao

The loop through the keys of %discs is simple, using grep() to see if a disc is in @common.

循环遍历 %discs 的键很简单，用 grep() 来查看一个唱片是否在于 @common 中。

youdao

This loop traverses the keys in directory, which are tuples.

上面这个循环会遍历字典中的键，这些键都是元组。

youdao

The oil slick has now entered the loop current that runs from the Gulf of Mexico to the Florida Keys and up the east coast of the U.S., Jarvis said.

VOA: standard.2010.05.26