The hard disk, also known as fixed disk, is composed if disk sheets of magnetic substance coated with mental material and read-write devices of the disk sheets.

硬盘又叫固定盘有金属材料涂上磁性物质的盘片与盘片读写装置组成。

youdao

The normal interest rate swap method is plain vanilla swap between floating rate and fixed rate. In substance, it is the cash flow swap between two interest payments.

利率互换最普遍的形式是浮动利率与固定利率之间的单纯利率互换，其实质就是将未来两组利息的现金流量进行互换。

youdao