how do i test two conditions in two different cells at a different

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how do i test two conditions in two different cells at a different time	how do i test two conditions in two different cells at a different temperature
how do i test two conditions in two different cells at a different rate	how do i test two conditions in two different cells at a different level
how do i test two conditions in two different cells at a different age	how do i test two conditions in two different cells at a different speed