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Leaves alternate, rarely opposite, estipulate, veins mostly pinnate, sometimes palmate, margin usually entire, rarely lobed or denticulate.

叶互生，很少对生，无托叶，多数羽状脉，有时掌状脉，边缘通常全缘，很少分裂的或者有小齿。

Seeds erect or pendulous, sometimes winged, usually exalbuminous, very rarely with thin endosperm; cotyledons mostly fleshy and convex abaxially, rarely folded or convolute.

种子直立或者倒生，有时具翅，通常无胚乳，极少有薄的胚乳；子叶几乎肉质并且背面凸，很少折叠或旋卷。

Leaves alternate or rarely opposite, odd-pinnate, 3-foliolate (or rarely 1-foliolate), stipulate or exstipulate.

叶互生或很少对生，奇数羽状复叶，具3小叶，具托叶或无托叶。

Leaves opposite, rarely verticillate, exstipulate; leaf blade simple, margin entire, serrate, or rarely pinnately lobed.

叶对生，很少轮生，无托叶；单叶，边缘全缘，有锯齿，或很少羽状浅裂。

Stamens 6, rarely 3, 4, or 8, inserted opposite perianth segments; filaments free or adnate to perianth, rarely connate into a corona; anthers usually 2-loculed, basifixed or dorsifixed and versatile, introrse, latrorse, or extrorse, dehiscing usually by vertical slits.

雄蕊6，很少3，4，或者8，与花被片对生；花丝离生，或者与花被贴生，很少合生成一副花冠；花药通常2室，基着或者背着和丁字着，内向，侧向，或者外向纵裂，通常以垂直裂缝开裂。

Spines leafy, rarely leafless; flowers in racemes, rarely solitary or fascicled; stamens more than 10, in several whorls.

刺多叶，很少无叶；花生于总状花序，很少单生或；雄蕊超过10，数轮。

Leaves alternate, rarely opposite, petiolate or subsessile; leaf blade flattened, slightly succulent, linear, lanceolate, oblong, ovate, triangular, rhombic, or hastate, margin serrate, rarely entire.

叶互生，很少对生，叶具柄或近无柄；扁平的叶片，稍肉质，线形，披针形，长圆形，卵形，三角形，菱形，或戟形，边缘有锯齿，很少全缘。

Main stem undeveloped; fertile stems several, arising from rosette, diffuse or ascending, 15--50(--100) cm, glabrous or puberulent on 1 side, very rarely densely hirsute. Basal leaves with blade linear, 5--15(--30) cm × 6--9 mm, margin ciliate only proximally; cauline leaves shorter, ciliate only on 1 side of sheath mouth, glabrous elsewhere, very rarely densely hirsutulous.

根状茎无。主茎不发达；能育茎数个，基生叶具线形的叶片，5-15(-30)厘米×6-9毫米，只下部的边缘具缘毛；茎生叶短，仅在鞘口部一边具缘毛，在别处无毛，极少浓密具微糙硬毛。

Shrubs or small trees, usually erect, rarely viny or climbing, glabrous, rarely pubsecent, branches often inermous.

灌木或小乔木，通常直立，很少倾斜或攀援的，无毛，很少短柔毛，枝经常无刺。

Stamens 5, inserted on corolla tube or rarely at throat, included or rarely exserted; anthers introrse, 2-loculed, usually dorsifixed at base, less often medifixed, dehiscence longitudinal.

雄蕊5，着生于花冠筒或很少在喉部，包括或很少外露；花药内向，2室，通常基部背着，较少是中部着生，纵向开裂。

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。