at best 充其量；顶多；至多；最多；最好也只是

【例句】
At best they were effective as antidepressants for no more than four months.
它们充其量也只能起到4个月的抗抑郁剂的效果。

His links with the organization turned out to be, at best, tenuous.
最后证实他与这个组织的关系充其量不过是不即不离罢了。