惯性

根据惯性定律，没有外力作用的物体将保持静止或匀速直线运动。

Gēnjù guànxìng dìnglǜ, méiyǒu wàilì zuòyòng de wùtǐ jiāng bǎochí jìngzhǐ huò yúnsù zhíxiàn yùndòng.

According to the law of inertia, an object without external force will remain at rest or move at constant velocity.