ring

环绕某物的对比材料、颜色等的长条纹。

A long stripe of contrastive material, colour, etc, that encircles something.

钟声或类似的共鸣声。

The resonant sound of a bell, or a sound resembling it.

一种代数结构,包含一个集合及两种二元运算:加法运算和乘法运算,使得该集合在加法运算下构成阿贝尔群,在乘法运算下构成幺半群,且乘法运算对加法运算满足分配律。

An algebraic structure which consists of a set with two binary operations: an additive operation and a multiplicative operation, such that the set is an abelian group under the additive operation, a monoid under the multiplicative operation, and such that the multiplicative operation is distributive with respect to the additive operation.

对有限并集和集合差封闭的集族。

A family of sets that is closed under finite unions and set-theoretic differences.

一种特有的声音

a characteristic sound

进行某些运动或展览的场所,尤指圆形或类似竞技场,如拳击场或马戏场；因此也指政治角逐的领域。

A place where some sports or exhibitions take place; notably a circular or comparable arena, such as a boxing ring or a circus ring; hence the field of a political contest.

悦耳或正确的声音。

A pleasant or correct sound.

一种代数结构,与上述类似,但只要求乘法运算构成半群,即不一定有乘法单位元。

An algebraic structure as above, but only required to be a semigroup under the multiplicative operation, that is, there need not be a multiplicative identity element.

对有限并集和有限交集封闭的集族。

A family of sets closed under finite union and finite intersection.

环形

a toroidal shape

一个排他性的小团体,通常涉及一些不道德或非法行为。

An exclusive group of people, usually involving some unethical or illegal practices.

某物特有的声音或外观。

A sound or appearance that is characteristic of something.

用于固定、悬挂或拉动的金属、木材或其他材料制成的刚性圆环

a rigid circular band of metal or wood or other material used for holding or fastening or hanging or pulling

由键连接形成分子中闭合链的原子组。

A group of atoms linked by bonds to form a closed chain in a molecule.

任何响亮的声音；众多声音的声音；持续、重复或回响的声音。

Any loud sound; the sound of numerous voices; a sound continued, repeated, or reverberated.

两个同心圆之间的平面几何图形。

A planar geometrical figure included between two concentric circles.

和谐调谐的钟声或一组钟。

A chime, or set of bells harmonically tuned.

放置在字母上方或下方的空心圆形变音符号；kroužek。

A diacritical mark in the shape of a hollow circle placed above or under the letter; a kroužek.

计算机系统中用于保护数据和功能的硬件级别的特权层次(也称保护环)。

A hierarchical level of privilege in a computer system, usually at hardware level, used to protect data and functionality (also protection ring).

用于将望远镜瞄准镜固定在步枪上的一对夹具。

Either of the pair of clamps used to hold a telescopic sight to a rifle.

第二十五张Lenormand卡片。

The twenty-fifth Lenormand card.

一种网络拓扑结构,其中连接的设备形成一个圆形数据通道。环上的所有计算机都可以看到每条消息,没有冲突,如果环的任何部分断裂,将发生单点故障。

A network topology where connected devices form a circular data channel. All computers on the ring can see every message, and there are no collisions, and a single point of failure will occur if any part of the ring breaks.