We know that we've done everything to make sure 我们已经竭尽全力
how sure are you? i don't know, 75 percent? 有多确定 不清楚 75%吧
You can guarantee he's fine? you're 100 percent sure? 你能保证他没事 百分之百确定吗
Now ask me why i'm not so sure about you. 问我 为什么我不确定你能胜任
It was yours. now i'm not so sure. 曾是你的 但现在我不确定
Are you sure that's the right diagnosis? 你确定诊断正确吗