顧ㄍㄨˋgù此ㄘˇcǐ失ㄕshī彼ㄅㄧˇbǐ

注意這個卻忽略了那個。指不能全面兼顧。《東周列國志·第七六回》：「彼疾雷不及掩耳，顧此失彼，二城若破，郢不守矣。」也作「顧三不顧四」、「顧一不顧二」。反面面俱到、兩全其美、一舉兩得

英lit. to attend to one thing and lose sight of another (idiom), fig. to be unable to manage two or more things at once, cannot pay attention to one thing without neglecting the other