例句：
The seat next to him was vacant.
他旁邊的座位空著。
She had a kind of vacant look on her face.
在她臉上有一種茫然的表情。
At graduation the students presented each other with valedictory inscriptions.
畢業時同學們互相題詞勉。
Rather, your valedictory address should leave former colleagues feeling a warm glow.
相反，你的告別演說應該讓以前的同事感受到溫暖的光輝。