The main difference is that a HashMap is instantiated that associates a String value to a String key.

主要差别是，实例化了一个HashMap，用于将一个string值与一个string键相关联。

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The key is hanging on a string by the door.

钥匙拴在门边的带子上。

《牛津词典》

This specifies a key as a 13-character (104-bit) string.

它将密钥指定为 13 个字符（104 位）的字符串。

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That is not good news for a government which faces a string of key state elections this year in the run-up to general elections, due in 2009.

BBC: India forced to raise fuel prices

The resulting splatter of light is recorded by a camera and converted into a 2, 400-bit key, or a string of 2, 400 zeros and ones.

FORBES: Magazine Article

To the end of the string is tied a metal key, and to the key is attached a silk (nonconductive) cord, which the experimenter holds.

FORBES: Magazine Article