具一叶的

Racemes terminal, pseudoterminal, or opposite to leaf, sometimes a panicle; apical appendage laciniate; unwinged part of capsule usually with obvious concentric ribs; seeds globose, strophiole hooded or helmet-shaped

总状花序顶生，假顶生，或者与叶，有时一种圆锥花序相反；顶端附属物条裂；无翅部分胶囊通常具明显的同心的肋骨；种子球状，种阜盔状或盔状 21

In homosporous plants, there is only one type of prothallus with both male and female sex organs.

在具同形孢子的植物中，只有一种雌雄性器官兼备的原叶体类型。

Male inflorescence a spike, raceme, or thyrse, sometimes branched, sometimes gathered into a terminal panicle by reduction of subtending leaves.

雄花序穗状花序，总状花序，或聚伞圆锥花序，有时分枝，有时聚集成一顶生圆锥花序具减小的苞叶。

Leaves in a basal or sub-basal rosette; leaf blade adaxially with white spots and tuberculate

叶在一基部的或近基部的莲座丛；叶片正面具白点和具瘤 2

Leaves alternate, distichous; petiole short; leaf blade with or without cystoliths on one or both surfaces, margin entire or toothed and not glandular; secondary veins pinnate.

叶互生，2列；叶柄短叶片有或没有乳状体在一或两面，边缘全缘或齿而不具腺的；次脉羽状。

Leaves opposite, sessile or petiolate; interpetiolar stipules well developed to reduced to a transverse ridge.

叶对生，无柄或具叶柄；叶柄间的托叶发育良好到一根横梁成脊状的退化至。

Leaves to 5 mm wide; inflorescences often with 2 cymules separated by a distinct rachis; sepals sparsely puberulent.

叶到5毫米宽；花序通常具2小聚伞花序一离生的轴分开；萼片疏生微柔毛。

By PCR analysis using specific primers, one specific band at 600~700 bp was distinctively present in cms backcrossed generations. It was genetically stable and cytoplasmically inheritable in the various backcrossed progenies.

根据Brassica nap型细胞质雄性不育相关基因orf222设计兼并引物，利用特异引物PCR方法，分别在不育源、F1、BC2以及BC3世代中扩增出一条600~700 bp 大小的特异条带，而在叶用芥菜保持系中无此条带，具细胞质基因遗传特性。

Leaves opposite, usually in many pairs; stipules small; petioles short, connate at base, forming a short sheath; leaf blade elliptic, ovate-elliptic, or elliptic-lanceolate, margin serrate, with 1 gland at serrate tip.

叶对生，通常有多对；托叶小；叶柄短，在基部的合生，形成一短鞘；叶片椭圆形，卵状椭圆形，或椭圆形披针形，边缘有锯齿，在有锯齿端部的具1腺体。

Common aquatic plant of eastern North America having floating and submerged leaves and white yellow-spotted flowers.

北美东部产的一种普通水生植物，飘浮叶长圆形至倒卵形，基部常具缺刻，花白色，有黄斑点。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。