Here, the nonlinear term is boundedbelow and need not be nonnegative.
这里，非线性项是下有界的并且不需要是非负的。
2
An existence theorem of positive solution is established for a superlinear second-order three-point boundary value problem. Here, the nonlinear term is boundedbelow and need not be nonnegative.
建立了超线性二阶三个边值问题的一个正解存在定理。这里，非线性项是下有界的并且不需要是非负的。
3
These steps are bounded—the value won't go above the upper limit set by the program or below the lower limit.