例句與造句

1. until about 1450 spherical trigonometry consisted of loose rules based on greek, hindu and arabic versions .
   差不多直到1450年球面三角的內(nèi)容由一些不嚴(yán)謹(jǐn)?shù)姆▌t組成，這此法則的基礎(chǔ)是希臘、印度和阿拉伯譯本。
2. It's difficult to find spherical trigonometries in a sentence. 用spherical trigonometries造句挺難的