三出羽状的

Leaves 2–3-ternate-pinnate, leaflets to 7 × 4 cm, glabrous; dorsal ribs broad, vittae 1 in each furrow, 2 on commissure.

叶2-3回三出羽状，小叶在7×厘米，无毛；背棱宽阔的部分，油管每棱槽1，在合生面上2。

Leaf blade 1–3-pinnate or pinnately decompound, rarely ternately dissected or simple and undivided.

叶片1-3回羽状或羽状多回复出，很少三出的多裂的或单的和不裂的。

As a result of analysis to many of the results of experiment, checked up on specimens, field investigation and combining with the theories of palaeobotany, comparative morphology, evolutional morphology of vascular plants and taxonomy, it can be concluded as following: the primitive sorts of Cycadaceae are the sorts that pinnate leafs are dichotomy; among these, the sort that pinnate leafs are tripinnate-dichotomy is most primitive, from this sort gradually evolve to bipinnate-dichotomy, to only for monopinnate-dichotomy, from this sort evolve to the sorts that pinnate leafs are simply pinna; among the sorts of simply pinna, the species that segments of megasporophyll possess much more triplicate to monodichotomy are most primitive.

经过大量的实验结果分析、查阅标本和野外调查，结合古植物学、比较形态学、演化植物学和分类学等理论进行分析，认为苏铁科原始的类型为羽叶呈二歧状分叉的种类，其中最原始的又是羽叶呈三回二歧状分叉的种类，从这个羽叶类型逐渐演化出一回二歧状分叉的羽叶类型，再演化出羽叶为单羽状的类型；而单羽状叶的类群中，又以大孢子叶侧裂片具三回、二回及一回二歧状分叉数量多的种类为最原始，而侧裂片二歧状分叉数量少的为较进化，侧裂片无二歧分叉的如拳叶苏铁类为最进化的种类。

The stem of annual medics was erection type or stolon type,the stem height reached 7-30.7cm,seeds were yellow and kidney shape,the developmental stage was 95～140 days,the accessions of annual medics will be divided into prematurity type and serotinous type by the developmental stage.

通过对一年生苜蓿形态的观测和生育期的比较发现，一年生苜蓿的茎为直立或匍匐，茎高7cm～30.7cm，三出羽状复叶，种子为黄色、肾形。

Basal petioles 10–20 cm; blade broad-triangular, 10–15 cm, ternate-2-pinnate; pinnae petiolulate; petiolules 3–6 cm; ultimate segments subovate, 3–11 × 2–6 cm, undivided or 2–3-lobed, both surfaces slightly roughened, sharply serrate or doubly serrate.

基部的叶柄10-20厘米；叶片宽三角形，10-15厘米，三出2回羽状；羽片具小叶柄；小叶柄3-6厘米；末回裂片近卵形， 3-11 * 2-6 厘米，不裂或2-3浅裂，两面稍变得粗糙，锐的有锯齿或重锯齿。

Leaves all basal, simple, palmate, ternate, or pinnate, sometimes reduced and scalelike, rarely absent.

叶全部基生，单，掌状，三出，或羽状的，有时退化和鳞片状，很少无。

Basal petioles 5–10 cm; blade triangular in outline, 10–15 × 5–10 cm, ternate-2-pinnate, primary pinnae 4–5 pairs; ultimate segments broad-ovate or suborbicular, 1–2 × 1–1.5 cm, margins coarsely serrate.

基部的叶柄5-10厘米；三角形的叶片轮廓， 10-15 * 5-10 厘米，三出2回羽状，初级羽片4-5 对；末回裂片宽卵形或近圆形， 1-2 * 1-1.5 厘米，边缘有粗锯齿。

Leaves petiolate, sheath narrow; blade ternate-pinnate or pinnatisect, membranous; ultimate segments filiform to lanceolate.

叶具叶柄，鞘狭窄；叶片回三出羽状或羽状全裂，膜；末回裂片丝状的到披针形。

Calyx teeth conspicuous, ovate-triangular; vittae 1 in each furrow.

羽状叶1-2回羽状或三出，末回裂片长披针形，全缘；果棱木栓质膨大的在基部。

Leaves 1–4-pinnate or ternate-pinnate; ultimate segments serrate to incised or pinnate.

留下1-4羽状的或三出羽状；末回裂片有锯齿到锐裂的或羽状。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐