可翻译为：Before sushi was known well by people,it experienced a long process.
Before sushi appeared in front of people,it experienced a long process.
英语翻译在寿司变得为人熟知之前,经历了一段漫长的过程.或者是在寿司进入人们的视野之前,经历了一段漫长的过程.
可翻译为：Before sushi was known well by people,it experienced a long process.
Before sushi appeared in front of people,it experienced a long process.