曾经有一段时光 There once was a time ; There was a time
曾经有过一段时间 Once there was a time
曾经有一段
There was once a period
以上为机器翻译结果，长、整句建议使用 人工翻译 。
曾经有一段时间，制造肥皂并不安全。
At one time, soap-making was not safe.
youdao
曾经有一段时间，亨利需要一本语法书来学习。
At one time, Henry needed a grammar book for his study.
曾经有一段时间，纽约市的建筑物几乎都是一样高的。
There was a time when New York City buildings were almost all the same height.
应用推荐
模块上移
模块下移
不移动