excel at的用法和樣例：
例句
- We finally got at a ledge of rock near the summit.
我們最後到達了靠近峰頂的一塊突出的岩崖。 - Mrs Jones was much in evidence at the party.
瓊斯夫人在晚會上很突出。 - He's good at volleying it back to his opponent.
他擅長於截擊球來反擊他的對手。 - She is good at making up stories.
她擅長於虛構故事。
