顾彼忌此gù bǐ jì cǐ
(1) 两者不能同时兼顾
例
钱粮输纳，必有定限，……限有定而百姓闲时办银，逢限上纳，无顾彼忌此之虑。——清·黄六鸿《钱谷比限》
英
take one into consideration to the neglect of the other;attend to one thing and lose sight of another