她有来自不同背景的许多朋友。

She has ___dozens of friends from various backgrounds.

有数十个因素会影响这类项目的结果。

There are ___dozens of factors that influence the outcome of such projects.

这次会议有数十位专家讨论技术的最新进展。

The conference featured ___dozens of experts discussing the latest advancements in technology.