a radical
可数名词，指主张极端变革的人。
He is considered a radical.
他被视为一个激进分子。
部首；自由基；基团；根；根式；词根辅音
A person who has radical ideas or opinions, especially one who wants complete social or political change.
(数或量的)根。
A root (of a number or quantity).
基团
(chemistry) two or more atoms bound together as a single unit and forming part of a molecule
表意文字(如汉字)中用于检索字的部分；通常也表义,但并非总是如此；参见下义。
In logographic writing systems such as the Chinese writing system, the portion of a character used to index it. Often, but not always, this is also the portion indicating meaning; compare the following sense.
自由基
an atom or group of atoms with at least one unpaired electron; in the body it is usually an oxygen molecule that has lost an electron and will stabilize itself by stealing an electron from a nearby molecule
凯尔特语中首辅音的基本形式,可经历凯尔特语首辅音音变。
In Celtic languages, the basic, underlying form of an initial consonant which can be further mutated under the Celtic initial consonant mutations.
激进分子
a person who has radical ideas or opinions
闪米特语中构成词根的一组辅音(通常为三个)中的任意一个。
In Semitic languages, any one of the set of consonants (typically three) that make up a root.
由共价键连接的一组原子,作为一个单元参与反应。
A group of atoms, joined by covalent bonds, that take part in reactions as a single unit.
自由基。
A free radical.
交换环R中,对于理想I,记为Rad(I)或√的理想,使得元素x∈R属于Rad(I)当且仅当存在正整数n使x^n∈I；等价地,所有包含I的素理想的交集。
Given an ideal I in a commutative ring R, another ideal, denoted Rad(I) or √, such that an element x ∈ R is in Rad(I) if, for some positive integer n, xn ∈ I; equivalently, the intersection of all prime ideals containing I.
环R中由具有某种“不良”性质的元素组成的理想。
Given a ring R, an ideal containing elements of R that share a property considered, in some sense, "not good".
给定模的全体极大子模的交集。
The intersection of maximal submodules of a given module.
给定正整数的不同质因数的乘积。
The product of the distinct prime factors of a given positive integer.
持激进观点的人。
A person with radical opinions.
The radical was arrested for protesting against the government's new policy.
这名激进分子因抗议政府的新政策而被捕。
用法提示：radical 作名词，意为“激进分子”。
AI contextual example
A free radical is a highly reactive atom or molecule that can damage cells.
自由基是一种高反应活性的原子或分子，会损害细胞。
用法提示：radical 作名词，意为“自由基”。
AI contextual example
In mathematics, the radical of a number is its square root or nth root.
在数学中，一个数的根是其平方根或n次方根。
用法提示：radical 作名词，意为“根（数学术语）”。
AI contextual example
可数名词，指主张极端变革的人。
He is considered a radical.
他被视为一个激进分子。
常用复数形式，化学术语。
Free radicals are highly reactive.
自由基具有高度反应性。
数学符号，用于表示开方运算。
The radical sign indicates the square root.
根号表示平方根。
语气更强，常含贬义；激进分子更中性
侧重推翻现有制度，比radical更极端
比radical温和，不主张极端手段
范围更广，不一定极端
grammar · medium
易错句子He is a radical person.
正确表达He is a radical.
中文'激进分子'已包含'分子'，英语中名词radical直接指人，无需再加person。
grammar · medium
易错句子The radical of 9 is 3.
正确表达The square root of 9 is 3.
数学中表示平方根通常用square root，radical虽可指根号但更常指根式或激进分子，此处用法不标准。
‘激进分子’强调变革的激烈程度，而‘极端分子’更侧重立场或手段的极端性，常带贬义。
在数学中，‘radical’常指根号或根式运算，而‘root’指方程的解或数字的方根，但两者可互换使用。
政治激进分子
He was labeled a political radical for his extreme views.
他因极端观点被贴上政治激进分子的标签。
激进活动家
The radical activist organized a protest against the new law.
这位激进活动家组织了一场抗议新法律的行动。
自由基
Antioxidants help neutralize free radicals in the body.
抗氧化剂有助于中和体内的自由基。
自由基反应
This chemical process involves a radical reaction mechanism.
这个化学过程涉及自由基反应机理。
根号
Write the square root using a radical sign.
用根号写出平方根。
根式
Simplify the radical expression to its lowest terms.
将根式化简为最简形式。
ical
ical
ical
ical
ical
ical
radic (root) + al (suffix)
rad (root) + ish (suffix)
e (prefix) + radic (root) + ate (suffix)
与激进分子一样，活动家也积极参与社会或政治变革。
激进分子常常倡导激进的社会或政治改革。
激进分子可能持有极端主义观点，推动激烈变革。
自由基是化学反应中不稳定的分子或原子团。
在数学中，根与指数运算相关。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.