English Dictionary

roll back

verb

(transitive) To return to a prior state. / (transitive) To postpone. / (intransitive, aviation, of a jet engine) To reduce thrust without having been commanded to do so. / (intransitive) To retreat.

I had to roll back the changes I made to the document.

意味（1）

(transitive) To return to a prior state.

We had to roll back the changes to the database because of an unforeseen error.

意味（2）

(transitive) To postpone.

NASA will roll back the shuttle launch due to bad weather.

意味（3）

(intransitive, aviation, of a jet engine) To reduce thrust without having been commanded to do so.

In the previous tests, it was suspected that the volume of fuel contained in pipework had effects, both in the time taken for the restriction to affect engine performance and the nature of the fuel flow fluctuations after the engine had rolled back. Therefore, it was decided that the restriction would be simulated with the use of an orifice plate which could be introduced adjacent to the component being investigated.

意味（4）

(intransitive) To retreat.