The principal aim is to create a home-like relaxing feel, so airlines tend to use soft colors that feel domestic, natural and earthy for that reason.

主要目的是营造一种家庭般令人放松的感觉，因此航空公司倾向于使用柔和的颜色，给人一种像家一样的、自然而朴实的感觉。

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The principal aim of the policy is to bring peace to the area.

该政策的主要目的是为给这一地区带来和平。

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To introduce such investigation is the principal aim of this paper.

介绍这类调查研究是本文的重要目的。

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Agency lawyer Louis Brown told the hearing that its principal aim was to "protect and enhance the environment" on inland waterways.

BBC: Environment Agency sued over carp-eating otters

His principal aim was to hold the line against all those changes in the 19th century that threatened the power of his own class, the territorial aristocracy.

ECONOMIST: British politicians: Just say no | The

The principal aim of these policy instruments was to promote development, social empowerment (poverty alleviation) and environmental conservation through participatory or community-based management and exploitation or utilisation of forests and forest resources.

UNESCO: Community-Based Forestry Management Programme