将科学知识应用到实际生活事务中去需要花费许多时间并付出极大努力。
It requires much time and effort for scientific knowledge to be applied to the practical affairs of life.
每天早上他都需要花费许多时间才能清扫完树叶，这让小和尚头痛不已。
Every morning, he had to spend a lot of time cleaning the leaves, and this gave the young monk a headache.
从第2厂到第5厂的产品线转换是一项复杂的工作，用户的订单因此需要花费许多时间。
The transition of the product line from plant 2 to plant 5 was a complex task with customer orders in hours.
从第2厂到第5厂的产品线转换是一项复杂的工作，用户的订单因此需要花费许多时间。
The transition of the product line from plant 2 to plant 5 was a complex task with customer orders in hours.
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