英语语法分析

Only a fraction of the A ions are in tetrahedral sites.

只有一部分A离子处在四面体的位置上。

The researchers poured tetrahedral dice into containers which they shook until completely full.

研究者把许多四面体状的骰子放进一个容器，晃动容器直至装满。

His work with tetrahedral kites led to the development of this flying machine a few years before 1910.

1910年前，他在四面体风筝方面的研究，导致了这艘飞行器的开发。