稀疏

Study on the interaction between rarefaction wave and premixed propane-air flame In the research, the co-flow and counter-flow rarefaction wave were induced to intervene in the flame by different ignition scheme.

另外，管道中压力波的作用是Tulip火焰结构形成的重要原因。(2)研究了稀疏波对丙烷-空气预混火焰传播特性的影响。

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The simulation results show that the asymmetry structure of the ratchet die cavity influences the BMG's flowing behavior greatly. During the material filling tooth cavity, dead zone volumes exist and situate on the areas with sparse teeth distribution. The full filling or not of the ratchet tooth tips, as the final filling region of the forming process, determines the super-plastic forming quality. Adopting smaller punch speed or longer load holding time is necessary for full filling of the tooth tips.

研究结果表明，棘轮模腔结构的不对称性对材料的流动行为影响显著；在材料向齿形的充填过程中存在流动死区，死区的位置处于齿形分布较稀疏的部位；齿形尖角是成形的最后充填部位，在终成形阶段采用较小的压下速度或较长的保压时间，有利于齿形尖角的完全充满。

Leaf blade 6.5-19 × 6-17.5 cm; spikes of distant glomerules to 40 cm.

叶片 6.5-19 * 6-17.5 厘米；稀疏团伞花序的穗状花序达40厘米的。

Subshrubs or shrubs to 3 m tall; leaf blade 6.5-19 × 6-17.5 cm; female spikes of distant glomerules 9-40 cm.

亚灌木或者灌木在3米高；叶片 6.5-19 * 6-17.5 厘米；稀疏团伞花序的雌性穗状花序9-40厘米。

Inflorescences axillary, usually 2-6-flowered in widely spaced glomerules.

花序腋生，通常花生于稀疏排列团伞花序。

The first layer of white glue was mixed with water but just a little.

先把白胶涂到上半部分的伞布上，要稀疏一点。

Much like Tibet itself, Aba is a sparsely populated, high-altitude region of rich forests, wooly yaks and golden-tipped Buddhist monasteries.

与西藏很类似，阿坝同样也是人口稀疏、植被茂密的高海拔地区，亦能见到被毛厚重的牛和金碧辉煌的佛教寺庙。

Slender hairy plant with few leaves and golden-yellow flower heads; sandy desert areas of southeastern California to southwestern Utah and western Arizona and northwestern Mexico.

纤细的、有毛植物，叶稀疏，金黄色头状花序；生长在加利福尼亚东南至犹他西南或在亚利桑那西部和墨西哥西北部的沙漠地区。

The Additional Guide Star (with star flag 5) is come into use for improving the accuracy and speed of star identification. After the cases analysis of unsuccessful star identification, giving the guide star which always cause false star identification a given star flag(such as 6), which denote that the star is a Redundant Guide Star and can't take part in the star identification processing. Through the introduction of Redundant Guide Star, the accuracy of star identification is improving. The distribution of Additional Guide Stars spread all over the whole sky, even the star sparse area.

在选取导航星的过程中，位置精度阈值的引入，使得高精度的恒星作为导航星，为高精度的卫星姿态反演奠定了基础；辅助导航星的引入，与单一使用Tycho-2星表相比引入了大量的亮星(189颗辅助导航星遍及全天球，其中亮于3等星的恒星占34.4%)，且弥补了部分天区恒星稀疏无法满足星图识别条件的不足，这将十分有利于提高星图识别速度和识别率；冗余导航星的剔除，为进一步提高星图识别率提供了可能。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。