求翻译：目标三：时间-费用优化。这个目标包括两个方面，一个是指在保证既定的工程完工时间的条件下，所需要的费用最少；或者是在限制费用的条件下，工程完工时间最短。是什么意思？

Goal 3: time - cost optimization. This goal includes two aspects, one refers to conditions to ensure that established the project completion time, the cost of the required minimum; or in the conditions of limiting costs, the project completed in the shortest time.

Goal 3: The time-cost optimization. This objective includes two facets, one of which is established in order to ensure completion of the project time, under conditions of the need to be the least-cost, or is in a restricted charge under the conditions of the project is completed, the shortest time.

Goal three: Time - expense optimization.This goal including two aspects, one is refers under the project completion time condition which the guarantee decides, needs the expense are least; Or is in under the limit expense condition, the project completion time is shortest.

Goal three: time-cost optimization. This target includes two aspects, one is guaranteed under the conditions of the planned project completion date, the cost of at least; or is under the condition of limited costs, completion of the shortest time.

正在翻译，请等待...