double negative

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However, in languages that do not have negative concord, such as Standard English and German, a double negative is understood to resolve into a positive.
然而在那些不具有否定和谐的语言中，比如标准英语和德语，双重否定会形成肯定。
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It also discovers that the grammatical placement has nothing to do with the semantic misplacement, but exerts remarkable effect on the occurrence of the double negative modalized statements.
英汉语言模态句中否定词的语义错位与其语法位置无关，但双重否定句却与否定词的语法位置有密切关系。
The design method and electromagnetic characteristics of cavity backed microstrip antenna with double negative (DNG) substrates are studied in the paper.
研究了以双负材料为衬底的背腔微带天线的设计方法与电磁特性。

If we want to talk about two hydrogen atoms, then we just need to double that, so that's going to be negative 2 6 2 4 kilojoules per mole that we're talking about in terms of a single hydrogen atom.
而要讨论两个氢原子，我们只需要把它乘以二，因此应该是负的，2624，千焦每摩尔,这就是单个的氢原子的情况。
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Despite double-digit negative returns in 2000 and 2002, his fund has had a good run.
FORBES: Stepping South Of The Border
This is the third negative double-digit spread in the past four weeks.
FORBES: Unusually High Level Of Pessimism Plagues Investors
Analysts are actually expecting negative double digit growth when compared to last year, so the picture is pretty terrible all around for the GRMN.
FORBES: Garmin Loses Its Way As Competition Surges

the use of two negatives (= words that mean "no") in the same phrase or sentence

a syntactic construction, often considered ungrammatical in standard Modern English, in which two negatives are used where one is needed, as in I wouldn't never have believed it