无气孔的

The results indicated that chromosome counting was the most reliable and precise method, however, it was cumbersome and required skilled cytological techniques; The chromocenter size, heterochromatin number, chroloplast number of guard cell and certain plant morphological characteristics are simple and practical methods for ploidydetermination but with some shortages.

结果表明：对体细胞染色体的直接计数法是最可靠的方法，但费时、难度大；叶片气孔大小与倍性无显著相关性；保卫细胞叶绿体数目、体细胞染色中心大小以及异染色质个数与黄瓜倍性密切相关，是简单、快速而有效的倍性鉴定方法；植株的形态学观察也能间接确定植株倍性，但鉴定时期偏晚，精确性较差。

Tight alloying layer with undulation and without visual pocket and inclusion has been obtained by experiment.The alloying layer is metallurgically combined with the matrix.

试验结果获得了致密、无肉眼可见气孔、夹杂、熔覆表面有一定起伏的合金层，合金层与基体间完全冶金结合；熔覆合金层由单相Fe3 Al构成，覆层组织为粗大的柱状晶团，柱状晶团内包含大量极细小的板条状Fe3 Al晶粒，一些相邻的板条晶之间具有基本相同的晶体学取向。

Dense alloy coating without pore and inclusion is obtained which metallurgically bonded with steel but existing a few cracks. The results show that the cladding alloy coating is mainly composed of single-phase Fe3Al, and the microstructure is coarse equiaxed grain-groups that consist of large amount of fined slug like Fe3Al grains, between which some adjacent grains have the similar orientation.

试验获得了致密、无肉眼可见气孔、夹杂的合金层，合金层与基体间完全冶金结合，但存在裂纹现象；熔覆合金层主要由单相Fe3Al构成，覆层组织为粗大等轴状晶团，等轴状晶团由大量极细小的条状Fe3Al晶粒构成，一些相邻的条状晶粒之间具有基本一致的晶体学取向。

SiC/Al composites were fabricated by pressureless infiltration technique, based on infiltration dynamics mechanism and technic method ,the effects of holding time and cooling way on the residual porosity of composites were discussed.

采用无压浸渗法制备了SiC/Al复合材料，从浸渗动力学和工艺方法的角度探讨了浸渗保温时间和降温方式对复合材料的残余气孔率的影响。

Leaves needlelike, slender or stout, straight or twisted, triangular, flabellate-triangular, or semiorbicular in cross section, stomatal lines several, on 1, 2, or all surfaces, vascular bundles 1 or 2, resin canals 2-10 or more, marginal or median, rarely internal, base enclosed by persistent or deciduous, membranous sheath. Pollen cones usually borne in spikelike clusters at base of 1st-year branchlets, sessile, cylindric or ovoid; pollen 2-saccate.

叶针状，纤细的或粗壮，直的或扭曲，三角形，扇形三角形，或半圆形在横断面上，气孔线数个，在1，2上，或全部表面，在第1 年的小枝，无梗，圆筒状的或卵球形的穗状的簇生在基部里的雄球花通常着生；花粉2囊。

The results show that the zirconium sol has good spinnability when n: n= 1:3, reaction time is 6h and aging temperature is 15℃. The ZrO_2precursor fibers are made from hydrous zirconia chelated by acetylacetone. The sintercd fibers arecomposed of metastable tetragonal phase and sized about 15μm in diameter. Moreover, there aremany pores inside the fibers, but no cracks.4. ZrO_2/PVP hybrid fibers were prepared by blending the spinnable zirconium sol and 10 wt%PVP solution.

结果表明，当n(ZrOCl_2·8H_2O)：n(H_2O_2)=1：3，反应时间6h，陈化温度15℃时可得纺丝性能良好的锆溶胶，ZrO_2前驱体连续纤维的组成主要为经乙酰丙酮配位的ZrO_2水合物，热处理后的ZrO_2纤维的相结构为亚稳四方相，纤维的直径为15μm左右，纤维中存在大量的纳米级气孔，但无明显裂纹。4。

Mol-1 of ozone are compared to those from the control run, indicating that from the heading to mature stage contents of chlorophylls a and b as well as the total increase first and then drop, but the carotenoid content and the value of value of chl a/b keep steadily rising and declinling, respectively, there is no significant decrease in the net photosynthetic rate and stomatic conductance during the early stage of heading but their drops increase gradually with prolonged smoking time.

mol-1的O3处理下，与对照相比，从抽穗期到成熟期冬小麦叶绿素a、叶绿素b和总叶绿素含量均呈先上升后降低的变化趋势，而类胡萝卜素的含量和Chla/b的比值则分别持续升高和下降，净光合速率和气孔导度在抽穗初期无明显下降，但是随着熏蒸时间的增加下降幅逐步变大。

The production cost of new chromite powder compound coatings is half of zircon coatings. The surfaces of castings that are produced used new chromite powder compound coatings are smooth without adhering sand and gas- hore.

例。新型铬铁矿粉复合涂料生产成本仅约锆英粉涂料的二分之一，可代替价格昂贵的锆英粉涂料生产无粘砂，气孔等缺陷，表面光洁的合金钢和碳钢铸件。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！