Gallium nitride turned out to be difficult to grow without defects, and although n-type gallium nitride could be made easily, p-type could not.
氮化镓最终被发现很难做到没有瑕疵，即使n型氮化镓很容易被造出，p型却不然。
Over the years of n-tiered architecture, it became evident that it was difficult to develop applications that give the end user a rich experience with a browser.
在n-tiered体系结构的这几年来，很明显开发给予终端用户丰富的使用浏览器方面经验的应用程序比较困难。
The typical model of output queueing in ATM switching has ideal performance, but is difficult to realize because of the need of high speed transfer that is N times the port speed.
典型的ATM输出缓冲交换结构有着理想的性能，但需要N倍端口速率的高速传送而难以实现。
The method was used in the complex area where the S/N ratio was poor and reflection residual static corrections were difficult to achieve success, which obtained good processing results.
将该方法应用于信噪比较低、反射波剩余静校正方法难以奏效的复杂地表区，获得良好处理效果。
The mass ratio of F190 to its companion is about 5, which means that it is difficult to obtain the information of the companion except for a very high S/N.
F190与其伴星的质量比在5左右，因此，除非有非常高的信噪比，否则我们很难探测到来自伴星的信息。
The coking wastewater is an organic one with high concentration of NH3-N and organic substance which are difficult to be degenerated.
焦化废水是一种氨氮和有机物浓度较高的、难降解的有机废水。
The coking wastewater is an organic one with high concentration of NH3-N and organic substance which are difficult to be degenerated.
焦化废水是一种氨氮和有机物浓度较高的、难降解的有机废水。
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