Do I need to change the lower bound?

我需要改下边界值么？

So, the lower bound will be given by the plane.

所以下限是由平面决定的。

How can I select items from a list lower bound to upper bound?

我如何从一个列表中选择上下边界的项目？

It may not be zero, but there is still a lower bound to interest rates.

虽然底线不再是零，但利率下限仍将存在。

Moreover, the application of lower bound theorem is especially difficult.

特别是下限定理的应用困难很大。