zero reference造句

例句与造句

1. The determination of absolute altitudes on the moon meets with difficulties because of the lack of a definite zero reference .
   月球上绝对高度的测定因为没有一个固定的参照零点，颇有困难。
2. In the repeatability tests the zero reference is basic
   零点的测量对于可重复性测量是最基本的。
3. It's difficult to find zero reference in a sentence. 用zero reference造句挺难的