Interrupts are hardware interrupts, while traps are software-invoked interrupts. Occurrences of hardware interrupts usually disable other hardware interrupts, but this is not true for traps. If you need to disallow hardware interrupts until a trap is served, you need to explicitly clear the interrupt flag. And usually the interrupt flag on the computer affects (hardware) interrupts as opposed to traps. This means that clearing this flag will not prevent traps. Unlike traps, interrupts should preserve the previous state of the CPU.

陷阱是一种特殊的中断，通常被称为软件中断。中断是一个更通用的术语，它包括硬件中断(来自硬件设备的中断)和软件中断(来自软件的中断，如陷阱)。

Interrupts are hardware interrupts, while traps are software-invoked interrupts. Occurrences of hardware interrupts usually disable other hardware interrupts, but this is not true for traps. If you need to disallow hardware interrupts until a trap is served, you need to explicitly clear the interrupt flag. And usually the interrupt flag on the computer affects (hardware) interrupts as opposed to traps. This means that clearing this flag will not prevent traps. Unlike traps, interrupts should preserve the previous state of the CPU.

A Trap can be identified as a transfer of control, which is initiated by the programmer. The term Trap is used interchangeably with the term Exception (which is an automatically occurring software interrupt). But some may argue that a trap is simply a special subroutine call. So they fall in to the category of software-invoked interrupts. For example, in 80×86 machines, a programmer can use the int instruction to initiate a trap. Because a trap is always unconditional the control will always be transferred to the subroutine associated with the trap. The exact instruction, which invokes the routine for handling the trap is easily identified because an explicit instruction is used to specify a trap. Trap Vs Interrupt

一个trap被像程序一样的代码调用，并用于例如调用操作系统例程(通常是同步的)。 中断是由事件调用的(很多时候是硬件，比如网卡接收到数据，或者CPU定时器)，并且-顾名思义-中断正常的控制流，因为CPU必须切换到驱动程序来处理事件。

A trap is a software interrupt.If you write a program in which you declare a variable having divide by zero value then it is treated as a trap.Whenever you run this program it will throw same error at the same time.System call is a special version of trap in which a program asks os for its required service. In case of interrupt(a general word for hardware interrupts)like an i/o error,the cpu is interrupted at random time and off course it is not the fault of our programmers.It is the hardware that brings them up.