Although this serves as a useful introduction as to the structure of sysfs and exactly how udev matches values, manually trawling through sysfs is both time consuming and unnecessary.

虽然这对于关于sysfs的结构和udev如何匹配值的介绍很有用，但手工对sysfs的梳理是个既耗时也没必要的事。

youdao

The experimental results show that the introduction of similarity probabilities can improve speech recognition and it is unnecessary to design a codebook as large as 256 codewords.

实验结果表明相似概率的引入有利于进一步提高语音识别率，同时发现大小为256个码字的码本是不必要的。

youdao

But I will begin by listing the well-known persons for whom further introduction is unnecessary.

FORBES: The 100 Most Influential People for Japan (2)

"In particular, we believe the introduction of a capacity mechanism will make the British energy sector highly inefficient, costing consumers many billions in unnecessary cost".

BBC: Energy bill to boost cleaner energy production