Such a ship

	作词 : 无
	作曲 : DR1N0
	Here are some important definitions.
	这些是定义。
	Displacement:
	位移：
	R=Re^jθ
	All particles of a body move in parallel planes and travel by same distance is known as linear displacement.
	物体所有粒子在平行的平面内移动相同距离称为线位移。
	A body rotating about a fixed point in such a way that all particles move in circular path is known as angular displacement.
	物体和它所有的粒子绕固定点沿圆周路径移动称为角位移。
	If we take the first order derivative of the displacement equation, we get:
	位移方程对时间求一阶导数得：
	d/dt(Re^jθ)=R'e^jθ+Re^(jθ)jθ'=R'e^jθ+Rθ'je^jθ
	The angular velocity
	角速度
	w=dθ/dt.
	The linear velocity
	线速度
	v=dR/dt.
	Acceleration, the rate of change of velocity.
	加速度是速度的变化率。
	Now we take the second order derivative of the displacement equation, we get:
	位移方程对时间求二阶导数得：
	d^2/dt^2(Re^jθ)=R''e^jθ+R'θ'je^(jθ)+(Rθ''+R'θ')je^jθ+Rθ'je^(jθ)jθ'=R''e^jθ+2θ'R'je^jθ+θ''Rje^jθ-R(θ'^2)e^jθ
	The angular acceleration
	角加速度
	α=θ''=dw/dt
	The linear acceleration
	线加速度
	a=R''=dv/dt
	Here's a simple case.
	举个栗子。

	zuò cí : wú
	zuò qǔ : DR1N0
	Here are some important definitions.
	zhèi xiē shì dìng yì.
	Displacement:
	wèi yí:
	R Re j
	All particles of a body move in parallel planes and travel by same distance is known as linear displacement.
	wù tǐ suǒ yǒu lì zǐ zài píng xíng de píng miàn nèi yí dòng xiāng tóng jù lí chēng wéi xiàn wèi yí.
	A body rotating about a fixed point in such a way that all particles move in circular path is known as angular displacement.
	wù tǐ hé tā suǒ yǒu de lì zǐ rào gù dìng diǎn yán yuán zhōu lù jìng yí dòng chēng wéi jiǎo wèi yí.
	If we take the first order derivative of the displacement equation, we get:
	wèi yí fāng chéng duì shí jiān qiú yī jiē dǎo shù dé:
	d dt Re j R' e j Re j j' R' e j R' je j
	The angular velocity
	jiǎo sù dù
	w d dt.
	The linear velocity
	xiàn sù dù
	v dR dt.
	Acceleration, the rate of change of velocity.
	jiā sù dù shì sù dù de biàn huà lǜ.
	Now we take the second order derivative of the displacement equation, we get:
	wèi yí fāng chéng duì shí jiān qiú èr jiē dǎo shù dé:
	d 2 dt 2 Re j R'' e j R'' je j R'' R'' je j R' je j j' R'' e j 2' R' je j'' Rje j R' 2 e j
	The angular acceleration
	jiǎo jiā sù dù
	'' dw dt
	The linear acceleration
	xiàn jiā sù dù
	a R'' dv dt
	Here' s a simple case.
	jǔ gè lì zi.