latexarray⽤法
$\begin{array}{*{3}{rlr}}
-xxxxxx & \text{ifxxx } x < 0, & xxxxxa &ss &ww &ggg\\
0xxxxxx & \text{ifxxxxx } x = 0, & ddxxxxx&rr&ttt&ttttt\\
xxxxxx & \text{ifxxx } x > 0.& ddxxxxxd&ttt&rr&t
\end{array} $
旋转木马音乐盒*{3}连在⼀起⽤,表⽰前3列
{rlr}表⽰前三列分别右对齐、左对齐、右对齐
$\begin{array}{*{5}{rlr}}
-xxxxxx & \text{ifxxx } x < 0, & xxxxxa &ss &ww &ggg\\
0xxxxxx & \text{ifxxxxx } x = 0, & ddxxxxx&rr&ttt&ttttt\\
xxxxxx & \text{ifxxx } x > 0.& ddxxxxxd&ttt&rr&t
\end{array} $
若格式也改变应力传感器
太阳能炉灶$\begin{array}{*{5}{rlcrr}}
客车
散热器机器人拉车-xxxxxx & \text{ifxxx } x < 0, & xxxxxa &ss &ww &ggg\\0xxxxxx & \text{ifxxxxx } x = 0, & ddxxxxx&rr&ttt&ttttt\\
xxxxxx & \text{ifxxx } x > 0.& ddxxxxxd&ttt&rr&t
\end{array} $