When speaking to somebody, we usually use indirect language to ask them not to do something. 要求某人不要做某事通常使用间接的表达方式：

• ◆ I'm sorry, smoking isn't allowed. / You're not allowed to smoke here. 对不起，不准吸烟。/这里不准吸烟。
• ◆ Would you mind not talking during the music? 演奏音乐时请不要说话好吗？
• ◆ Could I ask you not to use your phone here, please? 请不要在这里使用手机好吗？
• ◆ I'm afraid I have to ask you not to take pictures here. 对不起，请你不要在这里拍照。

Making an opinion sound less definite 以不确定的语气表达意见

• ◆Most cybercrime involves traditional crimes, such as theft and fraud, being committed in new ways. Phishing is perhaps / possibly / probably the best-known example of this. 大多数网络犯罪都包含盗窃、诈骗等传统犯罪，只是犯罪的方式有了新的变化。网络钓鱼大概是这类犯罪中最著名的例子。
• ◆It seems / appears that the more personal data which organizations collect, the more opportunity there is for this data to be lost or stolen. 看来各种机构收集的个人资料越多，这些资料丢失或被盗的可能性就越大。
• ◆ It seems clear that introducing national ID cards would do little to prevent identity theft. 看来很明显的是，采用全国通用身份证对防止身份盗用起不了什么作用。
• ◆ It could be argued that the introduction of national ID cards might actually make identity theft easier. 可以说采用全国通用身份证实际上可能使身份盗用更容易。
• ◆ It is possible that / It may be that the only way to protect ourselves against DNA identity theft is to avoid the creation of national DNA databases. 或许保护自己免遭 DNA 身份盗用的唯一途径就是不要建立全国 DNA 数据库。