1. They were anxious and gazing expectantly at their children, praying that they would ace the test.

2. By now I was an ace at driving on the left.

3. Id been doing some quiet investigating in the meantime and had an ace up my sleeve.

4. That is our ace in the hole.

5. She's an ace at carving.

6. He is an ace at chess.

7. Our superior technology is our ace in the hole.

8. We came within an ace of victory.

这些例句展示了“ace”作为名词（如“王牌”或“擅长某事的人”）和动词（如“发球得分”或“彻底打败”）的用法，以及它在句子中的不同搭配和含义。希望这些例句能帮助你更好地理解“ace”的用法。