我们曾设法劝他在无向导的情况下不要去爬山。

We tried to discourage him from climbing the mountain without a guide.

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为解决这些问题，对无定向导线的精度及布网形式进行了分析和讨论，并提出了有参考价值的建议。

For solving above problems, the accuracy and schemes of non-oriented traverse network are analyzed and discussed in this paper, which may lead to some useful Suggestions.

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由于无定向导线多余条件少。它的采用受到了限制。

Owing to the excess condition of non-directional traverse being little, its adoption is restricted.

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