heptagon

英式音标：[ˈheptəgən]播放读音

美式音标：[ˈheptəgɑn]播放读音

词汇分类：O/A level 分类英语词汇（上）数学、物理、化学、生物,物理专业词汇,最全词根词缀表（含例词）,真•词根词缀记忆——李平武,美国数学竞赛AMC8,生长和形态 2

概况：

n. 七角形；[数] 七边形

词义：

n.

七角形，七边形；

英英释义

heptagon[ 'heptəɡən ]

n.a seven-sided polygon

用法：

权威例句

Pentagons and heptagons in the first water layer on Pt(111).

Carbon arc production of heptagon-containing fullerene[68].

Pentagons, heptagons and negative curvature in graphite microtubule growth

Stability of dislocation defect with two pentagon-heptagon pairs in graphene

A Symbol of Uniqueness: The Cluster Bootstrap for the 3-Loop MHV Heptagon

Structural and electronic properties of pentagon-heptagon pair defects in carbon nanotubes.

The nature of strength enhancement and weakening by pentagon-heptagon defects in graphene

The nature of strength enhancement and weakening by pentagon-heptagon defects in graphene.

Chlorination of C86 to C84Cl32 with Nonclassical Heptagon‐Containing Fullerene Cage Formed by Cage Shrinkage

Two-dimensional tiling by rubrene molecules self-assembled in supramolecular pentagons, hexagons, and heptagons on a Au111 surface.

同义词：septangle

英语词源：

heptagon (n.)

1560s, from Middle French heptagon, from Greek heptagonon, from hepta "seven" (cognate with Latin septem, Gothic sibun, Old English seofon; see seven) + gonia "angle" (see -gon). Related: Heptagonal.

造句：

1. He speaks in a melodious baritone.

他的声音浑厚而有磁性。

来自柯林斯例句

2. Every morning I can hear a rich voice of the baritone.

每天早晨,我都能听到男中音浑厚的声音.

来自《简明英汉词典》

3. He sang in his rich baritone.

他以浑厚的男中音演唱.

来自《简明英汉词典》

4. Do you sing bass or baritone?

你唱男低音还是男中音?

来自《简明英汉词典》

5. "Sergeant, I should like a word with you," said the newcomer, in a pleasantly-inflected baritone.

“巡佐，我想和您说句话，”新来的人用悦耳的男中音说道。

来自柯林斯例句

[ baritone 造句 ]