Example: Ann was always ready to help at the drop of a hat.

例句：安做好事总是毫不犹豫。

Like fighter pilots, our astronauts would be able to blast into space at the drop of a hat.

就像战斗机飞行员一样，我们的宇航员可以轻而易举的进入太空。

It is at the drop of a hat to study the cultivation of specialists on technological news resort to the theory of risky society.

借助风险社会视域来观照我国科技新闻人才的培养显得刻不容缓。