To provide reliable data communication which can meet the requirements of real-time control is a technical key problem when two-leve microcomputer control is put into action.

提供能满足实时控制要求的可靠的数据通信，是实现两级微机控制的一个技术关键。

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In teaching and the course of training, it is the key of promoting the teaching and training records to find out the existent problem promptly and correct them in every technical link.

在教学和训练过程中，及时发现和纠正各个技术环节中存在的问题，使练习者清楚的认识到自己存在的问题并迅速的改正，是促进教学和提高训练成绩的关键。

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How to ensure veracity of accuracy class and its stability is a key technical problem in designing class 0.1 CVT.

如何保证准确级的准确性和稳定性是0.1级CVT设计中关键的问题。

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"Other than some type of key-recoverable system, there is currently no viable technical solution to this problem for law enforcement, " he said.

BBC: Security and law enforcement: the government view