How to understand substitute?

The meaning should be correct; let me put it together for you: Although the reactor is equipped with various instruments, alarms for abnormal operations, and automatic shutdown systems, these instruments can sometimes fail, (so) trained operators are irreplaceable. Last edited by bone on 2008-1-17 16:53]

From a practical perspective, “in case of” applies only to alarms and automatic shutdowns; therefore, the translation of “bone” is quite appropriate. Thank you again. :handshake :handshake :handshake

These cannot replace training for operators

I think this translation is more reasonable: Trained operators are irreplaceable!

But a literal translation like this has no connection to the preceding text and lacks logical coherence; therefore it needs to be rephrased. Based on the version of Bone, it is translated as follows: The reactor is equipped with a variety of instruments, alarms, and automatic shutdown systems in case of abnormal operation. However, instruments can sometimes fail. There is no substitute for well-trained operators. Although the reactor is fitted with various instruments, alarms, and automatic shutdown mechanisms in response to abnormal operations, these instruments can still malfunction from time to time, which is why trained operators are essential. This paragraph mainly emphasizes that having instruments, alarms, and automatic shutdown systems alone is not enough; trained operators are necessary to ensure the proper operation of the reactor. The last sentence cannot be translated literally – at first I tried translating it as “Operators are irreplaceable,” but it sounded awkward, so I posted it here for everyone’s feedback. This post was last edited by echommm on 2008-1-18 08:26]

It cannot replace well-trained operators.