rectilinear motion的用法和樣例：
例句
- The tendency of a body in motion to continue in motion along a straight line is known as inertia.
運動(dòng)物體繼續作直線(xiàn)運動(dòng)的傾向叫慣性。 - The simplest form of wave motion consists of the combination of a transverse simple harmonic vibration and a uniform translation.
波動(dòng)的最簡(jiǎn)單形式是橫向簡(jiǎn)諧振動(dòng)和勻速直線(xiàn)運動(dòng)的組合。
