at the experimental stage

• 处于试验阶段

at the experimental stage的用法和样例：

例句

1. The equipment is still at the experimental stage.
   这种设备仍处于试验阶段。
2. Despite the recent biologic and clinical advances, reproductive organ transplantation remains experimental and controversial.
   尽管最近的生物学和临床出现了进展，生殖器官移植仍旧处于试验阶段并存在争议。