Before you buy any wireless equipment, you need to be sure about what you're doing.(之前，你買任何無線設備，你必須要知道你在做什么。)

Be sure about the purpose of writing the feature story.(確定好寫特寫的目的。)

And we can be doubly sure about his father's influence because those who know Obama well testify to it.(而且關于其父的影響力這一點，我們可以得到加倍的確認，因為認識奧巴馬的人可以證實。)

As far as I am concerned, the only true stupid thing you can do is not to be sure about something and don't dare to ask!(在我看來，最愚蠢的事其實是知道自己有問題，但卻不敢問。)

When people are having a picnic, but it begins to rain, they will be so sure about something that shows the weather is going to be fine very quickly.(當人們正在野餐，但開始下雨時，他們會非常肯定地認為天氣會很快好起來。)

I'm sorry, but I can't be sure about that.(不能保證會是這么個結果…但我會盡力做。)

I can get along with everyone. All I want to be sure about when it comes to my boss and colleagues is that they are qualified for the job we do.(我和每一個人都可以處得很好，我只希望我的上司和同事有能力做好我們的工作。)

No one can be sure about his future. Future is not what fortuneteller tells you. It is created by yourself.(不誰可能對未來一目了然，將來并不是靠算命先生那張嘴說出來的，而是靠你本人發明出來的。)

The business stakeholders will not be sure about some requirements.(業務利益干系人將無法確定某些要求。)

For the future, I can only be sure about one thing: most of the people will choose not to wake up in the Matrix.(對于未來，我唯一能夠確定的是：大多數人都會選擇不從“母體”中醒來。)