This will also result in undesired output.

这还会导致不希望的输出。

If you don't, you may have unexpected, or undesired, results.

否则，就可能收到意外的结果。

Undesired side effects occurred at a similar rate in both groups.

在两组中，不希望有的副作用的发生率相似。

But we need to make sure they will not induce new and undesired processes.

但是我们需要确保这不会带来新的预料不到的结果。

An act of removing by cleansing; ridding of sediment or other other undesired elements.

除去脏东西；除去沉积或其它不需要的东西。