这种方式也常用于在新老销售代表不得不花大量时间来熟悉新产品和服务体系的时候。

This approach is also often used when new and old sales representatives have to spend a lot of time getting familiar with new products and service systems.

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然而，即使计算机和机器人技术不断发展，社会上总存在着大量的枯燥、重复和机械的工作，以及许多没有一技之长而不得不做这些工作的人。

However, even with the development of computers and robotics, there are always plenty of boring, repetitive and mechanical jobs, and lots of unskilled people who have to do them.

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去年我不得不为债务支付大量的利息。

I had to service a lot of debts last year.

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