“漠然置之”可以翻译为“treat with indifference” 或者 “leave sth. unattended/untouched out of indifference” 。
“treat with indifference” 侧重于表达以一种冷漠、不在乎的态度去对待某事或某人。例如：He always treats his work with indifference, which annoys his boss.（他总是对他的工作漠然置之，这让他的老板很恼火。）
“leave sth. unattended/untouched out of indifference” 更强调因为冷漠而不去处理、不接触某事。例如：She left the problem unattended out of indifference.（她出于冷漠对这个问题漠然置之，没有去处理。）