单语范例（未经PONS编辑处理）
These problems can be solved either by storing only some learned constraints or by occasionally discarding constraints.
en.wikipedia.org They provide more than potential constraints on action possibilities.
en.wikipedia.org These are generally referred to as cost functions and the other measures are treated as constraints.
en.wikipedia.org This section is omitted in one episode due to time constraints.
en.wikipedia.org To make things harder, there were three main constraints on the marriage of serfs.
en.wikipedia.org