instruction:
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.
question:
The Chinese People 's Liberation Army ( PLA ) is the armed forces of the People 's Republic of China ( PRC ) and of its founding and ruling political party , the Communist Party of China ( CPC ) .
answer:
The People 's Liberation Army ( or simply PLA ) is the armed forces of the Communist Party of China .

question:
The name Palaeoptera has been traditionally applied to those ancestral groups of winged insects ( most of them extinct ) that lacked the ability to fold the wings back over the abdomen as characterizes the Neoptera .
answer:
The Palaeoptera is the group of primitive ( basal ) winged insects which do not fold the wings back over the abdomen , as Neoptera do .

question:
Oxygen saturation ( symbol S ) is a relative measure of the concentration of oxygen that is dissolved or carried in a given medium as a proportion of the maximal concentration that can be dissolved in that medium .
answer:
Oxygen saturation or dissolved oxygen ( DO ) is a relative measure of the amount of oxygen that is dissolved in a given medium .