不尖的

Longitudinal root sections of the wild type and the gls mutant cultured in nutrient solution for 4 days showed that biosynthesis and distribution of amyloplast in the columella cells of gls were normal as compared with the wild type, suggesting that root gravitropism loss in gls mutant is not caused by the defect in amyloplast sedimentation, but possibly by the disturbance of auxin transport and distributation.

4天龄的根系纵切片结果显示：突变体gls根尖结构完整，根尖柱细胞内淀粉粒的生成和分布正常，表明gls突变体根系向地性的缺失不是由于淀粉体的原因，而可能通过影响生长素运输和分布造成。

Half-round fender to be fitted to the shell plating from forward shoulders to the aft shoulders at upper deck level and 1.50 m below upper deck. In addition, half-round fender to be fitted in way of forecastle and poop at two levels to secure that no mooring rope touch the shell. The fender to be of pipe 150 mm x 15 mm with flat bar inside. Fenders to be well supported from backside.

在船壳板的上甲板和上甲板以下 1.50m 位置处，分别安装有从艏尖突至艉尖突的半圆形护舷木，同时在艏楼和艉楼的两个位置上应安装有半圆形护舷木以确保系泊缆绳不与船壳板接触，并直径为 150mm×15mm 钢管的护舷木内部带有扁钢，以便对护舷木从背部进行很好地支撑。

At last, through the analysis of the T-stress, it is concluded that the T-stress plays an important role for the oriented microcrack cases. It is necessary to consider the effect of the T-stress in determining the shielding or amplification effect of the oriented microcracks.

最后，本文采用离散模型研究了各向异性材料主微裂纹干涉问题中T应力对主裂尖应力强度因子的影响：T应力对主裂尖应力强度因子的影响是不能被忽视的，这种影响不但与微裂纹的几何分布有关，而且还与T应力的大小和符号有关。

The figure of silicon tips etched in this novel etching solution is rocket tips on right rectangular pyramid rather than unsymmetrical eight sided pyramid etched in other etching solution.

更为重要的是该腐蚀液腐蚀的硅尖异于常规的不对称八棱锥，而是一种半锥角很小的"火箭尖"形状，因此可望获得更好的扫描特性和隧道效应。

Leaves 6–8 per ultimate branch; sheaths 6–9 cm, often white powdery; auricles inconspicuous; oral setae numerous, 2–3 mm; blade oblong-lanceolate or linear-lanceolate, 18–30 × 2–3.5 cm. Pseudospikelets fusiform, 2–3.5 cm, glabrous; prophyll ovate or ovate-lanceolate, 4–8 mm, thin, translucent, apex obtuse, keels 2, ciliate; bracts 1 to several, oblong to oblong-lanceolate, 7–22 mm, papery, many veined, apex obtuse to acute or mucronate; rachilla disarticulating.

每末级的分枝叶6-8；鞘6-9厘米，通常白色粉状；叶耳不明显；口头的刚毛多数，2-3毫米；叶片长圆状披针形披针形或线形， 18-30 * 2-3.5 纺锤形的厘米Pseudospikelets，2-3.5厘米，无毛；先出叶卵形或卵状披针形，4-8毫米，薄，半透明，先端钝，龙骨2，纤毛；苞片1到数个，长圆形到长圆状披针形，7-22毫米，纸质，很多脉，先端钝的到锐尖或短尖；小穗轴脱节。

Spikelets dorsally compressed, florets 1 or 2, disarticulating above glumes and between florets, rachilla extension with apical rudimentary floret present; lower glume minute or suppressed; upper glume leathery, appressed to rachis, exceeding and covering the sunken florets, closely 5–12-veined, apex acute to caudately awned; lemma much shorter than upper glume, rounded on back, cartilaginous to hyaline, 3-veined, apex obtuse to acute; palea membranous, usually equal to lemma.

背小穗压扁，小花1或2，脱节高于颖片和在小花，小穗轴扩展具顶端不发育之间宿存；压抑的更低的颖片小或；上面颖片革质，贴伏于轴，超过和包括沉没的小花，接近5-12脉，对具芒caudately先端锐尖；外稃远短于上面颖片，在后面，对透明，3脉，先端钝的到锐尖软骨上绕行；内稃膜，通常等于外稃。

The results showed that the rooting rate reached 83.2%~96.3% in 1/2 MS medium with IBA1.0~1.5 mg/L, The rooting rate of stem with top was significantly higher than that of stem without top; Snicking in stem base increased root number obviously, The appropriate substratum for transplanting was perlite and soil (1:1), The growth tendency of transplanting plantlets in May was slow-fast-slow.

结果表明：采用1/2MS培养基添加IBA1.0~1.5 mg/L，生根效果最好，平均生根率达83.2%~96.3%；带茎尖茎段的生根率显著高于不带茎尖茎段；茎段基部刻伤处理后较对照生根量明显增加；酸枣带根组培苗适宜的移栽基质为1：1的珍珠岩和土；5月份移栽下地的组培苗，其生长呈现慢-快-慢的趋势。

However, mechanical prosthetic valve has poor biocompatibility, and biological valve is easy to degrade and to be damaged. People have studied a new material to make valve. Giant molecule materials-made no-stent bio-mitral valve with chordae tendineae is similar to normal valve.

生物瓣具有血流动力学性能优秀，不需终生抗凝等优点，但机械瓣的生物相容性较差、生物瓣易退化损坏等问题，使人们开始对新的瓣膜制作材料进行研究，使用高分子材料制成的无支架带腱索生物二尖瓣与自然瓣膜相似，可维持人体二尖瓣生理功能、左室几何形状和血流动力学。

The results were as follows:1 The explants with two phyllomes(about 0.2-0.5mm in size )were found to be suitable for virus-free seedling culture , which were cultured on solid MS medium supplement with 6-BA,NAA and IAA ,The result indicated that the plantlet was over 30% after three months.

主要结果如下： 1。取带2个叶原基(长度约为0.2-0.5mm)的茎尖为外植体，在附加6-BA、IAA和NAA的MS培养基上进行3个月的培养，成苗率达30％以上。另外，在切取茎尖前对薯苗热疗(37℃)4周，在基本不影响成苗率的同时，可大幅度提高脱毒率。

The percutaneous mitral clip repair will find its place in the treatment armamentarium for mitral regurgitation, but several aspects of the study design raise questions, according to Dr. J. Scott Millikan, a cardiothoracic surgeon in Billings Montana.

来自蒙大拿州比林斯的心胸外科医师 Scott Millikan 博士表示，经皮二尖瓣夹合器修补将会在众多二尖瓣关闭不全疗法中找到自己的位置，但该研究设计的几个方面存在问题。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。