pteridosperm

英式音标：['(p)terɪdəʊspɜ:m]播放读音

美式音标：['terədoʊˌspɜm]播放读音

词汇分类：Word Menu

词义：

n.

种子蕨；

英英释义

pteridosperm

n.an extinct seed-producing fernlike plant of the order Cycadofilicales (or group Pteridospermae)

同义词：seed fern

用法：

权威例句

TETRAXYLOPTERIS SCHMIDTII GEN. ET SP. NOV., A PROBABLE PTERIDOSPERM PRECURSOR FROM THE DEVONIAN OF NEW YORK

A contribution to the knowledge of the pteridosperm genera Pseudomariopteris Danzé-Corsin nov. emend. and Helenopteris nov. gen.

A probable pteridosperm from the uppermost Devonian near Ballyheigue, Co. Kerry, Ireland

The chemical composition of Upper Carboniferous pteridosperm cuticles

Systematics of the Late Carboniferous Medullosalean Pteridosperm Laveineopteris and Its Associated Cyclopteris Leaves

Some Pteridosperm Stems and Fructifications with Particular Reference to the Medullosae

An improved method for obtaining large pteridosperm cuticles

Reconstruction of the frond of Laceya hibernica , a Lyginopterid pteridosperm from the uppermost Devonian of Ireland

Revision of the pteridosperm foliage Alethopteris and Lonchopteridium (Upper Carboniferous), Sydney Coalfield, Nova Scotia, Canada

A new pteridosperm from Upper Pennsylvanian deposits of North America

造句：

1. He suffered martyrdom by stoning.

他被处以石刑，以身殉难。

来自柯林斯例句

2. She sat picking at her small plate of rice salad with an air of martyrdom.

她坐在那里一点点地吃着一小盘米饭色拉，一副可怜兮兮的模样。

来自柯林斯例句

3. I have suffered a martyrdom from their incompetency and caprice.

他们的无能和任性折磨得我够受了.

来自辞典例句

4. His wife's never - ending complaints made his life one long martyrdom.

他妻子永无休止的抱怨使他的生活长期以来苦不堪言.

来自辞典例句

5. I should be very sorry to see you suffer martyrdom for me.

你为了我而作出牺牲,真让我有点儿过意不去.

来自辞典例句

[ martyrdom 造句 ]