Prefocus
vt.使预先聚焦, 预先调节…的焦距
🗣️ 情景例句
Who am I, you old rascal?
我是谁 ？你这个老玩童。
That was a close call! We nearly hit that car.
真是好险阿，我们差点撞着那辆汽车。
In this way, we have learned all that we know of the laws of astronomy,
例如，用这种方法，我们完全掌握了天文学的规律。