where the particle in the center of this chain

处在两个弹簧之间的粒子位于这一点时
will just sit there and it'll be hard to displace.

很难被移动
So it can vibrate.

粒子会以这点为中心震动
Now how about in the other case?

右边这幅图又会怎样呢
How about if it were electrical charges or gravity or something like that,

如果是像电荷间作用或是重力
an inverse square law that's holding things together?

那些与距离平方成反比的力呢
Then the second one is going to look like that,

这是我画出来的第二条线
and that one is indeed stronger.

第二个体系的作用将会更强
So they're two flanking bodies and we're interested in the position of the one in the middle.

两边各有一条线但我们关心的是中间的这块
And again, there'll be some point where they balance,

同样地两个力在某点会平衡
right there, where they're equal and opposite slopes.

就在这点它们的斜率互为相反数
How will this differ from the first case?

这和左边这幅图有什么区别吗