Translation of "regrettably" into Chinese

Given the regrettable absence of a comprehensive initial report, however, these observations are necessarily of a preliminary nature.

由于遗憾地没有一份全面的初次报告,这些意见必然是初步性质的。

The outstanding case was retransmitted and regrettably no response was received from the Government.

所有未决案件均已转交,但很遗憾,没有收到该国政府的任何答复。