有单叶的

After 13 months culture, sporophytes began to form. Each gametophyte had several archegonia, and only one sporophyte was produced per gametophyte. The first sporophyte frond was simple and had pinnate venation.

抱子体在经13个月的培养后开始产生，每个配子体虽然有许多的藏卵器，但只产生一株孢子体，第一片孢子体的叶片为单叶羽状脉。

Any of several evergreen climbing vines or shrubs of the genus Hoya, with a home range from India and southern China to Australia and having opposite, simple leaves and axillary, umbellate flower clusters.

球兰几种球兰属的常青爬藤或灌木，从印度及中国南部至澳大利亚均为其产地，生有对生单叶及腋生的伞型花序

Leaves simple, stipulate, venation craspedodromous, margin serrate and lobed or partite, rarely entire.

单叶，具托叶，脉序craspedodromous，分裂的边缘有锯齿和浅裂的或，很少全缘。

Leaves simple; petiole 5-15 mm; leaf blade adaxially dark green and nitid, obovate, 6-11 × 3-7 cm, papery, abaxially sparsely pubescent, crinite in axils of lateral veins, adaxially sometimes pubescent on midvein, lateral veins 8-15 pairs, straight or not, branched far away from margin, terminal veins running into teeth, attenuate from middle to base, upper margin undulate-serrulate, apex rounded or subtruncate, tip shortly acute. Panicle terminal, 9-30 × 10-20 cm, 4 × branched, pubescent.

单叶 叶柄5-15毫米；叶片正面深绿色和有光泽，倒卵形， 6-11 * 3-7 厘米，纸质，背面稀疏短柔毛，具长软毛的在侧脉腋处，在中脉上正面有时短柔毛，侧脉8-15 对，直与否，远离边缘的分枝，圆锥花序顶生， 9-30 * 10-20 厘米，4回分枝，短柔毛。

They have decussately arranged simple leaves often bearing elaborate stipules, and flower parts fused, in fours or fives (sometimes including one extra-large, brightly colored sepal), and 4-5 stamens that alternate with the corolla lobes.

单叶交叉轮生，常生有精巧的托叶；花部分合生在一起，4到5基数（有时包括一个特别大而鲜艳的萼片），4到5个雄蕊与花冠裂片交替分布。

Trees evergreen; trunk monopodial, straight; branches nearly whorled; branchlets ridged and grooved, with each leaf borne on a persistent, peglike base; short branchlets absent; winter buds ovoid, conical, or subglobose, resinous or not, scales on terminal buds recurved or not, persistent at base of branchlets.

常绿乔木树干单轴分枝，直；分枝差不多轮生；小枝具脊和凹槽，有每叶生于一持久，钉状基础；短小枝无；卵球形，圆锥状的冬芽，或近球形，与否树脂，由顶芽开出的鳞片与否，宿存在基部的小枝。

Cephalomappa is a monotypic genus endemic to Southweste and west of Guangxi Zhuang Autonomous Region. Its fresh leaves are used as feeding stuff for cattle, horse, sheep and can make them strong.

肥牛树为大戟科一单种属植物，肥牛树为优良木本饲料树种，是牛、马、羊的好饲料，据文献报道：用该植物的叶以饲牛，可使牛肥壮，故有肥牛树的名称。

Flowers short pedicellate or sessile, in racemes, spikes, or heads, sometimes solitary in axils of apical leaves.

花短有花梗或无梗，在总状花序，穗状花序，或头状花序，顶端的叶的有时单生在腋处里。

Leaves simple, rarely trifoliolate, opposite, sessile or shortly petiolate, no more than 5 mm; blade ovate to oblong-ovate, 11-14(-16.5)× 5.5-7(-8) cm, coriaceous, glabrous, adaxially lustrous green, abaxially pale green, main vein impressed adaxially and prominent abaxially, lateral veins 5-9(-11) pairs, slightly discernible adaxially and conspicuous abaxially, base subcordate, rarely rounded, margin glandular crenate or -serrate, apex apiculate, cusp 5-10(-15) mm.

单叶，很少具三小叶，对生，无梗或短具叶柄，顶多5毫米；叶片卵形到长圆状卵形， 11-14(-16.5)* 5.5-7(-8)厘米，革质的，无毛，正面的是有光泽的绿色，背面的淡绿色，主脉正面凹陷和突出背面，侧脉5–9(–11)对，正面稍可见，背面明显，基部近心形，很少圆形，边缘腺状圆齿或腺锯齿，先端具细尖，尖突5–10(–15)毫米。

A North American orchid bearing a single leaf and yellowish-brown flowers clustered in a raceme.

天距兰北美洲的一种兰花，长有一个单叶和谈灰黄色成穗状花序的花

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。