与此同时 这四个字怎么翻译成英文

与此同时:
1.meanwhile
2.at the same time
3.meantime
与此同时,我们等候着
Meanwhile we waited
简在油漆墙壁,与此同时帕特在看电视.
Jane was painting the walls and meanwhile Pat was watching T.V.
与此同时我继续进行调查.
Meanwhile I continued my investigations.