In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.

[EX Q]: The retina has no sensitivity to pain , and the effects of retinal damage may not appear for hours , so there is no warning that injury is occurring .
[EX A]: The retina does not feel pain , so damage may not be felt for hours .

[EX Q]: A mercury-arc valve or mercury-vapor rectifier or ( UK ) mercury-arc rectifier is a type of electrical rectifier used for converting high-voltage or high-current alternating current ( AC ) into direct current ( DC ) .
[EX A]: A Mercury-arc rectifier is a type of rectifier used for converting alternating current ( AC ) to direct current ( DC ) .

[EX Q]: The Angiosperm Phylogeny Group , or APG , is an informal international group of systematic botanists who collaborate to establish a consensus on the taxonomy of flowering plants ( angiosperms ) that reflects new knowledge about plant relationships discovered through phylogenetic studies .
[EX A]:
The Angiosperm Phylogeny Group ( APG ) is an informal international group of botanists who came together to try try and get a consensus on the taxonomy of flowering plants ( angiosperms ) .