measuring by sight

例句：

1. 1. We measured the length of the rope by measuring it with a tape measure.
   我们用卷尺测量了绳子的长度。
2. 2.The artist measured the room before painting it.
   艺术家在绘画前先测量了房间。
3. 3. The carpenter measured the door frame before installing it.
   木匠在安装门框前先测量了它。