因此，NGN的安全问题是一个值得深入研究的课题。
Thus, NGN security issue is a topic that is worthy of researching deeply.
现代市场是个信息不对称市场，企业如何在不对称信息市场下营销是一个值得深入研究的课题。
The modern market is an asymmetric information market, it is a topic worthy of in-depth study that enterprises how to marketing under the asymmetric information market.
车牌自动识别系统作为智能运输系统(its)的重要组成部分，是一个值得深入研究的课题。
The automatic license-plate recognition (LPR) system is one of the most important parts of ITS (Intelligent Transport system), and it is also an attractive subject.
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