Meanwhile means while a particular thing is happening.
Brush the aubergine with oil, add salt and pepper, and bake till soft. Meanwhile, heat the remaining oil in a heavy pan.
给茄子刷好油,加盐和胡椒粉,烤到软。同时,加热厚底锅中剩余的油。
Meanwhile means in the period of time between two events.
You needn't worry; I'll be ready to greet them. Meanwhile, I'm off to discuss the Fowlers' party with Felix.
你不用担心;我会做好准备迎接他们的。在此期间,我会去和费利克斯商量在福勒家聚会的事情。
You use meanwhile to introduce a different aspect of a particular situation, especially one that is completely opposite to the one previously mentioned.
He had always found his wife's mother a bit annoying. The mother-daughter relationship, meanwhile, was close.
他总是觉得他的岳母有点烦人。另一方面,她们母女之间的关系很亲近。