对于某些复杂的大型长期项目，如果其中包含的里程碑过多，可以根据日程表按月或按季付款。
In some large, long-running, complex engagements with infrequent milestones, payments may be scheduled on a monthly or a quarterly basis.
对于某些复杂的大型长期项目，如果其中包含的里程碑过多，可以根据日程表按月或按季付款。
In some large, long-running, complex engagements with infrequent milestones, payments may be scheduled on a monthly or a quarterly basis.
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