Lua等于函数和表

Question

我的代码是：

a = {"a1","a2","a3"}
b = a
b[1] = "b1"
print(a[1])

我无法理解为什么结果是＆＃34; b1＆＃34;而不是＆＃34; a1＆＃34;。

同样是：

 a = {"a1","a2","a3"}
b = a
c = b
b[1] = "b1"
c[2] = "c2"
print(a[1])
print(a[2])
print(a[3])

结果将是： ＆＃34; B1＆＃34; ＆＃34; C2＆＃34; ＆＃34; A3＆＃34;

我可以用其他方式复制变量吗？