A: The old library is being demolished next week.
A：那座旧图书馆下周就要拆除了。

B: That is a lamented loss for our local history.
B：这对我们当地的历史来说是一个令人惋惜的损失。

1) 哀悼的

2) 令人遗憾的

3) 表达悲痛的

1. 哀悼，惋惜

verb/adjective

1. To express grief or sorrow; to feel or express regret.

Synonym: mourned, regretted