Weaker force.

变小了
Weaker.

没错变小了
In fact only one or one and a half, or something like that,

因为此时大概只有一条或一条半场力线
lines of force are going through that.

通过了蓝线
Now, how does it depend on distance,

那么力和距离的关系究竟是怎样的
the number of lines going through this standard linked line,

这还是取决于通过所选区域的场力线数量
the blue one?

比如之前所提到的蓝线
Well you see that in flatland--we're just doing this in two dimensions,

在平面中我们先讨论两维情况
we'll get to three in just a second--in flatland,

之后再讨论三维在平面中
in two dimensions,

两维体系中
the circumference through which all these lines of force pass,

场力线通过的圆周长度
the length of the circumference is proportional to the radius. Right?

与半径成正比对吧