keystones的例句（keystones在句子中的用法）

• Perfect our speech is one of the keystones of an authentic spiritual program. 改善我们说话的能力是一项实实在在的基本心灵课程.
• The visibility of tracks in these tiny keystones is superb ( see picture below ). 这些小楔石中的轨迹其可视性非常的好.
• The Work Deletion and Keystones of Short Message Chicane Casesin Our Country. 我国应对短信诈骗案件的工作缺失及重点.