If a situation or action is fraught with problems or risks, it is filled with them.
The earliest operations employing this technique were fraught with dangers.
最早采用这一技术的手术充满了危险。
If you say that a situation or action is fraught, you mean that it is worrisome or difficult.
It has been a somewhat fraught day.
这是令人颇为担忧的一天。