When you're working on a file, it's saving constantly to RAM but also hopefully to disc, the hard disk so you don't actually lose it if the power goes off.
当你打开一个文件，它不断地保存在内存中，但对于光盘，硬盘，当你断开电源的时候，数据不会丢失。
2
Incidentally, I use "disc" instead of "disk" in variable names because that's what FreeDB USES.
顺便说一下，使用“disc”而不是“disk”作为变量名，是因为FreeDB的用法如此。
3
Conclusion:The target-injection of collagenase for intervertebral disk chemolysis may be complementary therapy for recurrent postoperative lumbar disc herniation.