例句與造句

1. During the calculation of crystallography , we always need to make some calculation such as vector length , angle between vectors or planes etc . this is a group of scilab functions which can make some common calculation
   晶體學(xué)計(jì)算過程中經(jīng)常需要計(jì)算矢量長(zhǎng)度、矢量夾角等。此scilab工具箱提供了一組適用于任何晶體結(jié)構(gòu)的函數(shù)，可以在輸入晶格常數(shù)的前提下，計(jì)算一些常用的晶體學(xué)數(shù)據(jù)。
2. It's difficult to find vector length in a sentence. 用vector length造句挺難的