locus

locus — 名詞

1. a formal word for the place where a particular event, activity, or situation hap

1.名詞B2
釋義

位置；核心

事件發生的地點或關注焦點

a formal word for the place where a particular event, activity, or situation happens, or the main topic that attracts attention in a discussion.

例句

The old market square became the locus of political protests during the summer.

夏天時，那座舊市集廣場成了政治抗議活動的核心地點。

the locus of + event (political protests)

For Karim, the family farm was the locus of all his childhood memories.

對 Karim 來說，家族農場是他所有童年回憶的所在。

locus of + abstract noun (memories)

同義詞
  • location

    the most general neutral term for a place; less formal than locus

  • site

    emphasises a specific place where something is built or an event occurs

  • centre

    focuses on the middle point of a physical area or of attention

  • focus

    emphasises the main subject of attention in a discussion or situation

文法句型

the locus of [event/interest/activity]

a locus for [purpose]

用法筆記

More formal than place or location. Best used in academic writing, journalism, or analytical discussion rather than everyday conversation.

常見錯誤

❌We met at a quiet locus near the river.
✅We met at a quiet spot near the river.
💡locus sounds unnatural in casual speech; use place, spot, or location instead.

2. in mathematics, a set of points or lines whose positions all satisfy a given rul

2.名詞C1
釋義

軌跡

滿足特定條件的點所形成的集合

in mathematics, a set of points or lines whose positions all satisfy a given rule or condition, often forming a curve or a shape.

例句

A circle is the locus of all points that lie at the same distance from a fixed centre.

圓是所有到固定圓心距離相等的點的軌跡。

locus of points + geometric condition

In geometry class, Kabir had to find the locus of a point moving in a parabola.

幾何課上，Kabir 必須找出點以拋物線移動的軌跡。

find the locus of [shape/curve]

同義詞
  • curve

    a visual representation of a locus; less precise mathematically

  • set of points

    a more general descriptive phrase; locus is the standard technical term

文法句型

the locus of points [that/which + condition]

常見錯誤

❌The parabola is a locus of points.
✅A parabola is the locus of all points that satisfy x² = 4ay.
💡locus in mathematics is usually introduced with 'the' and followed by a specific condition.

3. the fixed address on a chromosome where a specific gene or DNA segment is locate

3.名詞C1
釋義

基因座

染色體上特定基因的位置

the fixed address on a chromosome where a specific gene or DNA segment is located, and where genetic information can be found or inherited.

例句

Scientists identified the locus on chromosome 7 that is linked to the inherited disorder.

科學家確認了第七號染色體上與該遺傳疾病相關的基因座。

locus on [chromosome number] + associated with [condition]

Dr. Kwame pointed to the specific locus on chromosome 17 while explaining the BRCA1 test results to his patient.

Kwame 醫生指著第十七號染色體上的特定基因座，向病人解釋 BRCA1 的檢測結果。

locus on [chromosome] + medical explanation context

同義詞
  • site

    a less technical term for a position on a chromosome

  • location

    a general word for a place; locus is the standard genetics term

  • genetic marker

    a locus used as a reference point in mapping; not all loci are markers

文法句型

the locus for [gene]

locus on [chromosome number]

用法筆記

In genetics papers, locus is often abbreviated as 'loci' (plural). The plural ending is pronounced 'loh-sai' or 'loh-see'.

常見錯誤

❌The locus of the gene was on chromosome 5.' (acceptable but vague).
✅The BRCA1 locus is located on chromosome 17 at position 17q21.
💡in genetics writing, a specific locus name is usually given rather than a general statement.