Just a moment, please.是什么意思？

Just a moment, please.

请稍等一会儿.

just

adv. 刚才，仅仅，只是，正好，刚要；adj. 公正的，合理的，恰当的，合法的，正确的；

例句
It became very clear that the incident was not just an aberration, it was not just a single incident.
事实已经很清楚，这件事不是偶发的，它并不是一起孤立的事件。

moment

n. 瞬间，片刻，时刻，重要，紧要，[物]力矩；

例句
For a moment a shadow seemed to pass across Roy's face.
一瞬间罗伊脸上似乎闪过一丝忧伤。

please

int. 请；vt.& vi. 使高兴，使满意，讨人喜欢，讨好；

例句
She adored her parents and would do anything to please them.
她很爱自己的父母，为让他们高兴愿意做任何事。