无法将长表移至左边距，它位于页面的中心

Question

\begin{longtable}{ l l l } 
$\alpha$ &SiC polytype &alpha\\
$\beta$ &SiC polytype &Beta\\
Å &Bond Legth &Angstrom\\
I &Current &Ampere\\
U & Voltage &V\\
P &power &Watt\\
R & resistivity &ohm\\
$\rho$ & specific resistivity &ohm.mm\\
$^{\circ}C$ &temprature &centigrade\\
eV &bandgap energy &joule\\
$\Omega$ & resistivity &ohm\\
p &Pressure &bar\\
Mpa &presure &megapascal\\
Vol.\% &concentration &Volume percentage\\
D$_1$ & internal diameter &mm\\
D$_2$ & outer diameter &mm\\
t$_1$ & initial time &min\\
t$_1$ & final time &min\\
D &diameter &mm\\
L &length &mm\\
A &area &mm$^2$\\
v/v &concetration of a solution &volume per volume\\
M4 &thread size & 4 mm\\
\end{longtable}

Answer 1

longtable 有一个可选参数来控制对齐方式，默认为c（中心），但这里你想要的l是左边的对齐方式。

\begin{longtable}[l]