It was only with the growth of paediatrics and psychology in the twentieth century that studies could be carried out on a more objective, if still not always very scientific, basis.

只有在20世纪时，随着儿科学和心理学的发展，这些研究才能在一个更客观的基础上进行，即使这一基础仍然不一定很科学。

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The definition of the coastal line (datums of island, uncoverd neaf and lighthouse) is more clarified on the basis of scientific location.

在科学选址的基础上，对海岸线（岛屿基准面，明礁和灯塔）的定义更加明确。

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On the basis of available evidence, and these expert assessments of the evidence, the scientific criteria for an influenza pandemic have been met.

根据现有证据以及专家对证据的评估，已达到为流感大流行设定的科学标准。

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In response to concerns that large-scale ocean fertilization might be attempted before its consequences were fully understood, CBD, Parties to the LC and LP and IOC have urged governments to ensure that ocean fertilization activities do not take place until there is an adequate scientific basis on which to justify such activities, including an assessment of associated risks.

UNESCO: MEDIA SERVICES

The aim of IHP is also to improve the scientific and technological basis on which to build sound managing methods for water resources, respectful of the environment.

UNESCO: General Conference | About - Elections - Subsidiary Bodies

Once a serious risk of harm to the environment has been identified on the basis of the best scientific evidence available, we must act, even if this evidence is not yet exhaustive.

UNESCO: MEDIA SERVICES