covering

名词 n. 动词 v.
中文释义

英文释义

名词 n.
  1. That which covers or conceals; a cover; something spread or laid over or wrapped about another. countable
    — Face covering is also mentioned: "There are some circumstances when wearing a face covering may be marginally beneficial as a precautionary measure. The evidence suggests that wearing a face covering does not protect you, but it may protect others if you are infected but have not yet developed symptoms. [...] If you can, wear a face covering if you need to use public transport."
  2. Action of the verb to cover. uncountable
  3. A collection of sets U_i such that their union contains U; such a collection with the additional property that every U_i is open; such a collection with the additional property that every U_i is contained in U. countable,uncountable
  4. A special kind of map that establishes a relationship between two topological spaces in the sense that, under the action of the map, the one looks locally like several copies of the second: Formally, a continuous map π:E→X between topological spaces such that there exists, for every point x in X, a discrete space D_x and an open neighborhood U of x such that π⁻¹(U)= displaystyle ⨆_(d∈D_x)V_d and π|_(V_d):V_d→U is a homeomorphism for every d∈D_x. See Covering space on Wikipedia.Wikipedia countable,uncountable
动词 v.
  1. present participle and gerund of cover form-of,gerund,participle,present

词形变化

coverings plural

词汇关系

衍生词
bedcovering covering horse covering index face covering floorcovering head covering precovering semicovering subcovering undercovering wall covering wallcovering window covering

词源

词源 1
Present participle or participial adjective from cover (verb) + -ing; or, from Middle English coverynge, participle form of coveren, keveren (“to cover”).
词源 2
From Middle English coverynge, -inge, keverynge, -inge [verbal noun of coveren, keveren (“to cover”)]; or, verbal noun from cover (verb) + -ing.
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