凹形

The notch in the end of an arrow that fits on the bowstring.

箭上的凹口箭末端的 v形凹口，用来搭弓弦

A nonlinear eddy-viscosity turbulent flow model, which adopted third-order correlation of stress tensor and strain tensor, was modified and applied to flow computing of turbulent flow of internal combustion engine.

把采用了应力张量和应变张量的三阶相关关系的一个非线性涡粘度湍流模型进行修正后应用于内燃机缸内湍流流动计算，用此模型对几种ω形凹坑燃烧室内燃机汽缸内的流动进行计算，特别考查不同结构燃烧室内各处的湍能的变化，给出了燃烧室结构对缸内湍能影响结果，结果表明，凹坑结构时内燃机缸内湍能的分布和平均湍能的大小影响很大，可适当调整燃烧室结构来改变缸内湍流结构。

It uses a small X-ray tube scanning on a cylinder surface to simulate the trough-like source, and a point detector or a linear array detector moving on a circle and an orthogonal line to acquire the projections.

首先，我们用一个小型的X射线源在凹面上沿"Z"字形扫描，来模拟栅形扫描的凹面源。

Result: 1. The situation of HIV infection in gastro-mucosal tissues:(1) Our study found HIV gag sequence in not only CD4~+ T cells but also mucosalepithelial cells, gland epithelial cells in lamina propria and spindle stromal cells;(2) HIV p24 was expressed in T cells, plasmocyte, and a few mucosa epithelial cells, gland epithelial cellls and dell epithelial cellls.

结果：1.HIV在胃黏膜中的感染状况：(1)HIV感染者胃黏膜内HIVgag区基因不仅见于CD4~+T细胞等免疫细胞中，少数胃黏膜上皮、腺上皮、小凹内上皮细胞和间质梭形细胞中亦有阳性杂交信号；(2)HIV感染者尸检胃黏膜内HIVp24蛋白于T细胞、浆细胞及少部分胃黏膜黏膜上皮、腺上皮及小凹上皮细胞中呈阳性表达。2。

Anthers confluent to corolla, uniformly pale and glossy with long margin and dorsal groove, apex retuse, appendages sharply delimited, ovate, scarious except for narrow midrib, covering stigma head; pollinia 2 per pollinarium, oblong, pendulous.

对花冠汇合的花药，均匀浅和和背侧具凹槽的有光泽具长边缘，先端微凹，锐的附属物限定，除了狭窄的中脉卵形，干膜质，花粉块2 每pollinarium，长方形，下垂。

Basal leaf blade orbicular or broadly ovate-orbicular, base cordate with a deep sinus, apex obtuse and apiculate; cauline leaf much smaller than basal ones; petals oblanceolate, with 2 green, oblong glands near base, apex acute

基生叶圆形或宽卵形圆形，基部心形具一深的凹缺，先端钝和具细尖；茎生叶很多小于基生者；花瓣倒披针形，具绿色，长圆形腺体近基部，先端锐尖 17 P。 yui 俞氏梅花草

Firstly, the mechanical analysis on the stability of deep-concave open pit slope based on the theory of elasticity has been presented, thus offering the probable cause theoretically for using the convex-form slope in the deep-concave open pit on one hand and the preliminary method to determine the rational shape of slope on the other hand.

首先，基于弹性理论对深凹露天矿边坡的稳定性做了力学分析，从而为凸形边坡在深凹露天矿的应用提供了理论依据，同时为确定合理的边坡形状提供了初步方法。

In this way, the formation of a groove it ABCDEA "∞" shape of the seal space (such as single-head screw, the axial groove to Shun Rao screw plate to the mouth through the smoke emission and can not form a seal).

这样，凹槽ABCDEA也就组成一个&∞&形的密封空间(如采用单头螺纹，则凹槽将顺轴向盘饶螺杆，将吸排口贯通，无法形成密封)。

In this way, also the formation of a groove ABCDEA "∞"-shaped seal space (such as single-head screw, the groove will shun Rao axial screw plate to the mouth through the suction row, unable to form a seal).

这样，凹槽ABCDEA也就组成一个&∞&形的密封空间(如采用单头螺纹，则凹槽将顺轴向盘饶螺杆，将吸排口贯通，无法形成密封)。

In this way, the formation of a groove it ABCDEA "i" shape of the seal space (such as single-head screw, the axial groove to Shun Rao screw plate to the mouth through the smoke emission and can not form a seal).

那样，凹槽ABCDEA也便组败一个&i&形的密封空间(如采取双尾螺纹，则凹槽将逆轴向盘饶螺杆，将吸排口贯通，无奈构成稀封)。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。