Ford himself put an end to his chances by telling the nation that it was "perfectly safe with Coolidge."

VOA: special.2011.01.27

So it was a little risky but safe in the end because I didn't do anything else with it.

所以它有点冒险但是最终是安全的,因为我没用它做其它的操作。

哈佛公开课 - 计算机科学课程节选