1. We have an old musical instrument. It is called a clavichord.
    我们有一件古老的乐器.它叫击弦古钢琴。

2. We have an old musical instrument. It is called a clavichord.
    我们有一件古老的乐器.它叫击弦古钢琴。

3. Our clavichord is kept in the living room.
    我们的这架古钢琴存放在起居室里。

4. It is called a clavichord.
    被称作古钢琴，