instruction:
In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
question:
Mures ̧ is a county ( judet ̧ ) of Romania , in the historical region of Transylvania .
answer:
Mures ̦ County ( -RSB- , , ) is a county ( " judet ̦ " ) of Romania , in the historical region of Transylvania , with the administrative centre in Ta ̂ rgu Mures ̦ .


question:
In marine sediments methane is produced when sulfates are low .
answer:
In marine sediments the biological production of methane , also termed methanogenesis , is generally confined to where sulfates are depleted , below the top layers .


question:
Engineers design materials , structures , machines and systems while considering the limitations imposed by practicality , safety and cost .
answer:

Engineers , as practitioners of engineering , are professionals who invent , design , analyze , build , and test machines , systems , structures and materials to fulfill objectives and requirements while considering the limitations imposed by practicality , regulation , safety , and cost .