It is a grievous affair to my poor girls, you must confess.

你得承认，这对于我可怜的女儿们真是件不幸的事。

youdao

Mr. Morris said the victims had suffered from a very grievous mistake.

莫里斯先生说受害者们为一个非常严重的失误而受苦。

《柯林斯英汉双解大词典》

He had been the victim of a grievous injustice.

他曾遭受极不公正的待遇。

《牛津词典》

He responds to this grievous loss privately by taking it on himself, by seeking to master it himself, and specifically as a worker.

他私下里对失去孩子的痛苦的反应,是自己承受，努力地自己承受，尤其是作为一名工人。

耶鲁公开课 - 现代诗歌课程节选

Even before it had started, Angola 2010 suffered a grievous blow, when a rebel faction attacked the Togolese team as they travelled into the northern enclave of Cabinda.

BBC: Angola 2010: Tragedy and triumph

After all, Talbott has with his pronouncements repeated a grievous error made by the Bush Administration concerning Mikhail Gorbachev: A Kremlin leader reputed to be committed to reform is made the determinant of U.S. policy toward Russia (and, for that matter, its neighbors and former satellites).

CENTERFORSECURITYPOLICY: Center For Security Policy

This is a grievous example of the NRDC yet again manipulating the story to continue to advocate for a ban that has been shown once again to be scientifically unfounded.

FORBES: It's Time for the NRDC to Stop Its BPA Escapade