(1)倫理によると
(2)倫理的な方法で
(3)倫理的な観点からすると
(4)according to ethics
(5)from an ethical point of view
さらに詳しく
(1)上品なやり方で
(2)in a tasteful way
(3)in a tasteful way; "this building is aesthetically very pleasing"