工程师检查了塔的垂直度以确保其结构稳定。

The engineer checked the ___verticality of the tower to ensure its structural stability.

这座摩天大楼的垂直度经过精确测量，以确保结构安全。

The ___verticality of this skyscraper was precisely measured to ensure structural safety.

建筑师仔细检查了塔楼的垂直度以确保结构安全。

The architect checked the ___verticality of the tower to ensure structural safety.