gerontin

例句：

1. 1. The geronda is the only one that can be used for both writing and drawing.
   格朗达是唯一一个既能用于书写又能用于绘画的工具。
2. 2. The geronda was designed to make it easier for people to write and draw.
   格朗达的设计是为了使人们更容易书写和绘画。
3. 3. The geronda has become an important tool in the field of art and design.
   格朗达已经成为艺术和设计领域的一个重要工具。