closed form measure

例句：

1. 1. Theengineer used a closed-form measurement to calculate the angle of the roof.
   工程师使用闭式测量来计算屋顶的角度。
2. 2.The closed-form measurement method is more accurate than other methods.
   闭式测量方法比其他方法更准确。
3. 3.In this experiment, we used a closed-form measurement to measure the length of the rod.
   在这个实验中，我们使用闭式测量来测量杆的长度。