How to activate env in powershell

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I’ve create an environment in miniconda. when I use conda activate myenv, powershell7 doesn’t response anything. But it’s fine to run conda env list. I thought it was the PATH issue, so i manually add Miniconda,Script, bin, into system variavle path, but still fail to activate environment. Also, I’ve try conda init powershell, it doesn’t help either. What should i check. O.O