There is a general Standard English grammar rule in that you can only have one negative in a sentence.

有一个标准的英语语法规则，在一个句子中只能有一个否定句。

So let's compare to the correct standard English version.

因此，让我们与正确的标准英文版本进行比较。

So CACTUS, FOCUS and  RADIUS become CACTI, FOCI and RADII - although, the standard English FOCUSES sounds a lot  less poncey than FOCI.

因此 CACTUS、FOCUS 和 RADIUS 变成 CACTI、FOCI 和 RADII - 尽管标准英语 FOCUSES 听起来不像 FOCI 那样夸张。

Students who speak in a minority dialect, such as African-American English, are often disparaged for having a poor grasp of standard English grammar.

讲少数民族方言（例如非裔美国人英语）的学生经常因对标准英语语法掌握不佳而受到贬低。

In fact, the whole reason why there are two English spelling standards, British English and American English, is because the Americans eventually decided to simplify the spelling of English words to try and make English spelling a little less complicated.

事实上，为什么有两种英语拼写标准，也就是英式英语和美式英语，是因为美国人最终决定简化英语单词的拼写，试着让英语拼写没那么复杂。