In many instances they are automatic.

在大多数情况下，他们都是自动发送的。

In many instances, this increases performance drastically.

在很多情况下，这会极大地提高性能。

In many instances, their role is simply that of a watchdog.

在许多情况下，它们的作用很简单，一个监督。

In many instances, decades of such work has not produced the desired results.

在许多情况下，依赖了几十年，都没有产生预期的结果。

In many instances, the company went to customers' homes to collect the cars.

很多情况下，公司挨家挨户上门收集汽车。