First, the prevailing circumstances.

首先是，主流的环境。

youdao

Every vessel shall proceed at a safe speed adapted to the prevailing circumstances and conditions of restricted visibility. A power-driven vessel will have her engines ready for immediate manoeuvre.

每一船应以适合当时能见度不良的环境和情况的安全航速行驶，机动船应备好车以备紧急操纵。

youdao

Throughout history, Chinese philosophy has been molded to fit the prevailing schools of thought and circumstances in China.

纵观历史，中国哲学已经成型，以适应当前的学校思想和我国的情况。

youdao

That was, rightly, interpreted then as an expression of disquiet from the Palace at prevailing circumstances in Scotland.

BBC: Royal role in independence debate