Accordingly, although defined as a temporary exaction, it was often permanent in fact, and no doubt contractors experienced in the subtleties of working in Iraq made suitable allowances.
因此，虽然名义上是一项临时性杂税，事实上常常是永久性的；熟悉伊拉克微妙办事方式的承包人无疑已将这种情况适当考虑在内。