大面积

It is shown that the results based on this approach are in good agreement with the accurate numerical results. The propagation characteristics of metal-clad exponential index distribution waveguide are analyzed, too.

在外延生长过程中，采用微欠饱和母液回熔方法，提高了外延生长的重复性，解决了较大面积外延生长的表面质量问题，回熔厚度可控制在1μm左右，回熔表面平均平整度在30—200nm之间。

An approximate analytical approach, which can be used to analyze the optical characteristics of metal-clad step or graded index waveguides in near cutoff, is presented at first. The mode propagation characteristics of metal-clad step index waveguides in near cutoff are comprehensively analyzed.

GaAs/GaAlAs异质结光波导材料是目前集成光学中的重要材料，本论文在系统介绍外延生长技术的基础上，利用普通的液相外延炉，成功地生长出可用于光波导器件制作的、表面较光滑并具有较大面积（14×16mm〓）的GaAs/GaAlAs异质结光波导材料，C-V法测得波导层载流子浓度为2—4×10〓cm〓，Al-Schottky接触的反向电压大于20伏，平板波导和脊波导通光实验良好。

It will bring huge economic and social costs, and cause vast unrest, migrations and potential conflict.

它将造成巨大的经济和社会耗费，同时也会引发大面积的动乱、移民以及潜在冲突。

Main function: end mill of engraving machine platform, to crave in a large area

主要性能：雕刻机平台的铣刀平，大面积雕刻

On certain large area moldings it is often advantageous to use both parting surface pins and molding face pins.

某些大面积的塑件常常同时使用分型面顶杆和塑件面顶杆，这是有利的。

More noticeable with darker colours on large areas of flat mouldings..

更注意到黑暗的颜色在模具面大面积出现。

Generally, cultivation of a blast resistant variety in large-scale induce higher survival pressure to cause mutation in blast fungus Magnaporthe grisea that generates new virulence and enhances pathogenicity to result in resistance losing quickly in popular variety.

当大面积栽培单一抗病品种将会提高田间稻热病病原菌的生存压力，迫使病原族群产生变异，使得推广作物品种丧失抗性。

These wheals vary considerably in size, from few millimetres or several centimetres in diameter, they may merge to involve large areas of the body.

这些wheals有很大的差别的大小，从数毫米或数厘米直径的，他们可能会合并到涉及大面积的身体。

Compared with other CMS plants, the molecular basis of CMS rice is very unclearer, especially for those having been extensively used in hybrid breeding of China. So here, a serial molecular techniques are adopted to study the molecular basis of HongLian tylp CMS rice, taking sterile line , maintainer line , and hybrid F〓 HL No.

针对国内几种大面积推广的CMS水稻分子基础研究相对比较落后的状况，本文以水稻红莲型粤泰细胞质雄性不育系A和保持系B及杂种一代F〓为材料，运用一系列分子生物学技术和方法着重研究了红莲型水稻CMS的分子基础。

Worldwide experiences, such as the east and southeast Asian financial turmoil in 1997, has shown us that risks of real estate financing will trigged a disastrous financial crisis, which will greatly hazard the stability of finance even the whole national economy.

当房地产价格持续下跌，房地产抵押贷款的担保基础就会被削弱，而房地产金融风险具有累积性，一旦爆发，便会迅速扩大，出现大面积的金融风波。我国房地产业起步晚，房地产周期在强度、时间上虽然存在不同于其他国家的特点，但其破坏性却有目共睹。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷