kāi chē qián yào tiáo zhěng hǎo guān hòu jìng de jiǎo dù，bì miǎn chū xiàn shì jué máng qū。

开车前要调整好观后镜的角度，避免出现视觉盲区。

Before driving, you should adjust the angle of your rearview mirrors to avoid blind spots in your vision.