And one of the reasons why is that the equipment is so complex and so expensive that it's really only done at major universities and large institutions.
و یکی از دلایل اینه که تجهیزات آنقدر پیچیده و گران هستند که تنها در دانشگاه های مهم و موسسات بزرگ آنجام می‌شود.