gum up the works

But too often, human frailties gum up the works by leaving unforeseen breaches in otherwise secure systems.

但情况经常是，人为过失在原本安全的系统中留下意外的漏洞，把事情弄糟。

Still, in some applications, nano-materials gum up the works, or break down after a few dozen charges and discharges, experts say.

然而，专家说，在某些应用条件下，纳米材料反而不利，或是会在几十次充放电后发生衰减。

Aggressive drivers, who don't give the car in front of them enough space, and timid drivers, who need a big gap between themselves and the cars surrounding them, gum up the works for everybody else.

胆大的司机不会给前面的车辆让出足够的地方，而胆小的司机需要自己车周围有大的空间，这就阻碍了他人车辆的行动。