无可否认,空气污染是一个极其严重的问题 there is no denying the fact that air pollution is an extremely serious problem: the city authorities should take strong measures to deal with it
22the emergence of the mobile phone and the rise of text messaging as a popular means of communication would appear to have impacted on standards of writing as evidenced in the responses of candidates , % 22 the report said , according to wednesday % 27s irish times 爱尔兰国家考试委员会在针对去年15岁学生考试成绩的评论报告中称,语法和标点错误频频出现,已成为一个严重的问题。
With the popularization and the wide application of computer network , network security becomes a serious problem . user authentication , which is a technology to confirm the truth of user ' s allegation of identity , is an important method to guarantee the network security 随着计算机网络的普及和应用的日益广泛,网络安全已成为一个严重的问题,而对用户的身份认证是确保网络安全的重要条件。
With the continued scaling - down of mosfet , the ultra - thin gate oxide causes some serious problems of devices . the ultra - thin sio2 dielectrics cause significant leakage current , consequently increases standby power of device . meanwhile , the reliability of gate dielectrics is also degraded 当mosfet器件按比例缩小到70nm尺寸以下时,传统的sio _ 2栅介质的厚度将需要在1 . 5nm以下,如此薄的sio _ 2层产生的栅泄漏电流会由于显著的量子直接隧穿效应而变得不可接受,器件可靠性也成为一个严重的问题。
Both eckel and johnson point to a similar list of problems with checked exceptions ; some are inherent properties of checked exceptions , some are properties of the particular implementation of checked exceptions in the java language , and some are simply observations about how the widespread misuse of checked exceptions has become such a significant problem that perhaps the mechanism needs to be rethought Eckel和johnson都指出了一个关于检查型异常的相似的问题清单;一些是检查型异常的内在属性,一些是检查型异常在java语言中的特定实现的属性,还有一些只是简单的观察,主要是关于检查型异常的广泛的错误使用是如何变为一个严重的问题,从而导致该机制可能需要被重新考虑。
In the hfc network , the uplink channel is applied a spectrum of 5 to 42mhz . although such a spectrum is of good attenuation characteristics , one fact is that other services also share the same spectrum , making the noise introduction a serious concern . also the noise will gradually accumulate , thus severely affecting the transmission performance of cablemodem 在hfc网络中,上行信道采用5 ~ 42mhz的频带,虽然这一频带具有良好的衰减特性,但是因为其他服务也采用这一频带,所以引入噪声成了一个严重的问题,并且这个噪声将逐步积累,严重地影响cablemodem的传输性能。