Four main factors, it seems: gender, personality, external circumstances and age.

似乎有四个主要因素：性别，个性，外部环境以及年龄。

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There are two main kinds of error that get in the way of seeing a work of art: biases you bring from your own circumstances, and tricks played by the artist.

阻碍你观看艺术作品的错误主要有两类：一是源自你自身环境的偏见；二是艺术家玩的把戏。

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The main picture is almost the same in both high - and low-income countries, but the circumstances under which these incidents occur differ.

在这方面，高收入和低收入国家总的情况大体相同，但这些事故发生的具体环境却差异较大。

youdao

Its main job, under normal circumstances, is to provide the prime minister with a weekly briefing on the security threats facing the UK and to advise the cabinet secretary on the funding needs of the intelligence agencies.

BBC: John Scarlett has been chief of MI6 since 2004

During hundreds of camping trips and meetings and service projects and weird and wonderful events such as the Klondike Derby (a cold-weather competition in which scouts drag makeshift sleds over frozen ground for hours), I learned how to adapt to changing circumstances on the fly while keeping the main goals in sight.

WSJ: A Lesson From the Scouts' Own Book

It is the third set of circumstances how to work together during emergencies in surrounding areas which represents the main thrust of the revised guidelines.

ECONOMIST: Can Japan be Asia��s policeman?