1. The musician played the note with a diesis, giving it a slightly higher pitch.
那位音乐家用一个半音来演奏这个音符，使其音高稍微升高。

2. In order to play the scale in the correct key, the pianist had to add a diesis to the third note.
为了按照正确的音调演奏音阶，钢琴家必须在第三个音符上升一个半音。