observed造句 181. The effect of atmospheric refraction error on observed value is a very thorny problem in EDM trigonometric leveling. 182. These angry symptoms were keenly observed by Maggie, and cut her to the quick.
observed造句 181. The effect of atmospheric refraction error on observed value is a very thorny problem in EDM trigonometric leveling. 182. These angry symptoms were keenly observed by Maggie, and cut her to the quick.