查询词典 concave line

Sessile spikelet dorsally compressed; callus very short, obtuse, shortly bearded; lower glume cartilaginous, broadly convex to slightly concave, flanks rounded, keeled toward apex, apex acute to obtuse; upper glume boat-shaped, dorsally keeled; lower floret reduced to a small empty hyaline lemma; upper lemma stipitiform, entire, awned from apex; awn geniculate, glabrous or puberulous.

背的无梗小穗压扁；胼胝体非常短，钝，短具髯毛；更低的颖片软骨质，对稍凹，侧面圆形，龙骨状的向先端，先端锐尖到钝宽凸；上面颖片舟状，背龙骨状；更低的小花退化至一小的空的透明的外稃；上面外稃柄状，全缘，从那里先端；膝曲的芒，无毛或被微柔毛。

Corolla white, 3-4 mm, strigose outside, subglabrous inside, funnelfrom, throat to 2 mm wide; upper lip emarginate; middle lobe of lower lip subcircular, slightly concave; lateral lobes semicircular, margin entire.

花冠白色，3-4毫米，在外面具糙伏毛，在里面近无毛，funnelfrom，对2毫米宽的喉；上唇微缺；下唇近环形的中部裂片，稍凹；半圆的侧面裂片，边缘全缘。

Culm sheaths deciduous, leathery to thickly papery, usually rigid, white powdery, apex truncate or concave, sometimes with subcircular projection at base of one margin; auricles usually inconspicuous; oral setae usually developed; ligule short, truncate, margin serrulate or fimbriate; blade usually reflexed, adaxially densely hispid, apex usually involute.

竿箨脱落，似皮革的到厚纸质，通常硬，白色粉状，先端截形或者凹，叶耳通常不明显；口头的刚毛通常发育；叶舌短，削去，边缘有细锯齿或流苏状；叶片通常反折，正面密被糙硬毛，先端通常内卷。

Ovary subglobose, with concave nectaries at base.

子房近球形，具凹陷蜜穴在基部。

Seed face deeply concave or sulcate.

深深的种子表面凹或者具槽。

Seed face deeply sulcate or concave.

种子表面具深槽或凹。

The assembling of tremie should be firm, possessing smooth inner wall and straight shape without local concave-convex.

导管制作要坚固，内壁光滑，顺直，无局部凹凸。

Concave curves in conveyors have the tendency to lift the conveyor belts out of the curves and the troughing idlers, resulting in Big Problems.

这样形成的凹曲线在运行中有使皮带脱离槽形托辊和机架形成的轨迹，结果造成大问题。

It is widely employed in many industrial domains. The most attractive domain of ring rolling technology is to roll the rings with specially-shaped cross section directly. But the rolling deformation law of ring with specially-shaped cross section is more complicated compared with rectangle section ring and in the process there are lots of special phenomenon such as underfilling, shrinking-drawing, concave, saucer shape and etc.

环件轧制技术最有吸引力的领域和发展方向是直接轧制成形截面轮廓复杂的异形截面环件，然而，与矩形截面环件相比，异形截面环件轧制成形规律更复杂，轧制过程中常常出现截面轮廓充不满、拉缩、凹坑、碟形等各种特有现象，这些现象是异形截面环件轧制成形规律的客观反映。

The distribution property of combinatorial sequences is a basic problem in combinatorics. One of the most important properties is unimodality which includes unimodal, log-concave, log-convex and PF properties.

组合序列分布性质的研究是是组合数学中最原始最基本的问题之一，其中一类重要的分布性质是单峰型性质，包括单峰性、对数凹性、对数凸性和PF性质等。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？