Unpredictability makes life harder for would-be kidnappers and assassins .

这些不确定性就给了绑架者及刺客以可乘之机。

That effectively made the pirates professional kidnappers rather than robbers .

这实际上就使得海盗成了专职绑匪而非强盗。

We got another e-mail from the kidnappers .

我们又收到了劫持者的一封邮件。

Mr berlusconi 's lawyers deny that he paid the kidnappers .

而贝卢斯科尼的律师已经否认了他曾付钱给绑架犯。

They can usefully protect trade secrets or safeguard directors from kidnappers or busybodies .

它们可以保护商业机密，保护董事不受绑架者或者好事者的骚扰。