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This is impractical for engineering problem. It is necessary to break the shear layer in order to enchance mixing. It is very useful for combustor design with cavity or dual-cavity. In such combustor the fuel jet can break the

要使超声速混合增强，必须打破稳定的剪切层，燃烧室采用凹槽或双凹槽设计是一种行之有效的方法，它产生的燃料射流就能打破剪切层，从而使混合和燃烧效率进一步提高。

It is provided with rapid opening and closing, and convenient and safe usage, which comprises a lock body with handle (1) and a lock head (2), characterized in that at one side of the lock body (1) there is a shaft pore (7), which is combined with the rotary shaft on the lock seat to form the rotary mechanism; at the other side there is a lock port (8) with hump surface (9), which is mated with the lock tongue (16) on the lock head (2) to form the locking mechanism; at the oblique upside of shaft pore (7) on the lock body there is a hollow cavity with lock core, in which there is a lock strip (6) fixed on the lock seat which is combined with the hollow cavity with lock core to form the locking and limiting mechanism.

提供一种开启关闭轻快，使用安全方便的超低温冷冻柜的柜锁。包括带手柄的锁体(1)、锁头(2)，其特征是锁体(1)一侧有一个轴孔(7)，与固定在柜门上的锁座的转轴构成转动机构；锁体(1)另一侧有一个带有驼峰(9)曲面的锁口(8)与锁头(2)上的锁舌(16)啮合，构成锁紧机构；锁体(1)的轴孔(7)斜上方有一个装有锁芯的空腔，空腔内装有一个固定在锁座上的锁挡片(6)与装有锁芯的空腔组成锁体锁止和限位机构。

Problems ,such as selection of the corresponding stuff, selection of the surge ponderance in the cavity and the influence of the minishing prism couplers on the mode of the ring laser cavity are discussed.

对采用棱镜耦合器的全反射棱镜式环形激光器的耦合输出特性进行了理论研究，导出了有&楔形&间隙的棱镜耦合器的反射系数和透射系数表达式，给出了反射率和透过率随&楔形&间隙高度变化的理论计算曲线，进而研究了有关材料选取、腔内振荡分量的选取及减小棱镜耦合器对环形激光腔内模式的影响等问题。

Some bone trabeculae showed medullary cavity formation. In the control sides, the grafts were fused with tibias at 4 weeks. Some iliac crest bones degraded gradually, but the bone trabeculae of grafts also could be seen in the medullary cavity after 60 weeks.

植入髂骨的对照侧4周时移植的髂骨与周围胫骨紧密愈合，部分位于髓腔内的髂骨逐渐降解，但直到60周时仍可在部分髓腔中见到移植的髂骨骨小梁。

The theory of folded cavity is discussed. The stable condition of Z-shaped cavity A-O Q-switched system is analyzed by transmitted matrix.

运用矩阵光学的传输矩阵理论分析了Z型折叠腔声光调Q系统稳定运行的条件。

After scanning, signals of tissues from the images of plain and enhancement scannings around the articular cavity in cavity are measured.

扫描结束后，对平扫和增强图像中的关节腔周围组织及关节腔内信号进行测量。

The cell in acidic situation presented a degenerative chang-ment,such as an increased lipid drop and empty cavity in the cell plasma,a py-knotic nuclei,the dilatation of the endoplasmic reticulum and Golgi saccules,mi-tochondrial swelling the number of ribose decrease,and the ribose dissociated inthe plasma,a lot of swallowing cavity,the fibric material decreased accompany-ing with the acid being stronger.

随培养基pH逐渐下降，上述过程因受酸性阻抑而延缓，细胞增殖速度也受影响，处于酸性环境中的软骨细胞呈退行性变化，表现为细胞浆内脂质颗粒与小泡增多、细胞核皱缩、核仁浓染、内质网线粒体膨胀、核糖体数目减少，且与粗面内质网结合的少，游离在胞浆中的多。

Right hand at the top of the frame. Second, he uses a Bookwalter pediatric ring retractor system to keep the vaginal cavity open as the dissection progresses. Two retractors attached to the bottom of the ring maintain downward and lateral pressure within the cavity.

其次，Dr。 Meltzer用了Bookwalter小儿科环形牵引器系统来保持阴道张开，以利整个切割手术进行，环底附着的两个牵引器则维持了阴道向下和侧面的压力。

Meltzer right hand at the top of the frame. Second, he uses a Bookwalter pediatric ring retractor system to keep the vaginal cavity open as the dissection progresses. Two retractors attached to the bottom of the ring maintain downward and lateral pressure within the cavity.

其次，Dr。 Meltzer用了Bookwalter小儿科环形牵引器系统来保持阴道张开，以利整个切割手术进行，环底附着的两个牵引器则维持了阴道向下和侧面的压力。

Meltzers right hand at the top of the frame. Second, he uses a Bookwalter pediatric ring retractor system to keep the vaginal cavity open as the dissection progresses. Two retractors attached to the bottom of the ring maintain downward and lateral pressure within the cavity.

其次， Dr。 Meltzer 用了 Bookwalter 小儿科环形牵引器系统来保持阴道张开，以利整个切割手术进行，环底附著的两个牵引器则维持了阴道向下和侧面的压力。

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。