double folium

orbital and frontal trocar

眼眶双叶穿刺套管计

two-lobe epitrochoidal shape

双叶长短辐圆外旋轮线形状

a genus of dicotyledonous plants.

一种双子叶属的植物。

minimum ellipse of a hyperboloid of one sheet

单叶双曲面的最小椭圆

balance vane pump

双作用卸荷式叶片油泵

of a leaf shape; having doubly pinnate leaflets (as ferns).

指叶子形状；有双重羽状叶（如厥类植物）。

the wood of broad-leaved dicotyledonous trees (as distinguished from the wood of conifers).

阔叶双子叶树木的木料（区别于针叶树木材）。

Projectivity of Hyperboloids of One or Two Sheets;

双曲抛物面与单叶双曲面的射影性质

type and sole genus of the Clethraceae; deciduous shrubs or small trees: white_alder, summer-sweet.

桤叶树属的模式单属；双子叶的灌木或乔木。

bistable trigger element

双稳(态)触发元件[触发器](螺旋桨)叶素，叶片

A flowering plant with two embryonic seed leaves or cotyledons that usually appear at germination.

双子叶植物具有两片胚籽的或通常在萌芽上有双子叶的花卉植物

Research into Resources of Color-Leaved Trees on Mt. Huangshan (Ⅱ):Spring and Double Color-Leaved Trees;

黄山彩叶树种资源研究(Ⅱ)——春色叶与双面叶树种资源

The authors show that the hyperboloid of one sheet and the hyperbolic paraboloid are ruled surfaces.

作者证实：单叶双曲面和双曲抛物面是直线曲面。

All trees except palms are dicotyledons.

除了棕榈树，所有的树都是双子叶植物。

a dicot genus of the family cucurbitaceae including watermelons.

南瓜科的一个双子叶的属，包括西瓜。

in grasses and dicotyledons

在禾本科和双子叶植物中

Most dicotyledous are epigeal.

大部分双子叶植物都是地面上的。

a large order of dicotyledonous plants of subclass Dilleniidae.

五桠果亚纲双子叶植物的一个大目。