They were failing lamentably to help their sons grow from boyhood to manhood.

令人惋惜的是，他们没能帮助儿子们从少年长大成人。

《柯林斯英汉双解大词典》

The disbursement of foreign money to rebuild the south has been lamentably slow.

为重建南方而进行的外国资金的分发一直以来都过于缓慢，让人惋惜。

youdao

European economies have perked up recently, but the record is still of lamentably slow growth and high unemployment.

欧洲经济最近重新振作起来，但增长仍相当慢，并且失业率较高。

youdao

Lamentably, the financial crisis and the Bernard Madoff scandal convinced many to steer clear of advisors.

FORBES: Why You Can't Be Your Own Financial Advisor

But that disguises the very basic sense in which RBS's response has been lamentably poor.

BBC: Is outsourcing the cause of RBS debacle?

But calm, public discussion of their benefits and drawbacks has been lamentably lacking.

ECONOMIST: BIOMETRICS