句首，“长期以来”怎么翻译成英语

长期以来: ever since a long time ago

Examples:

他长期以来一直努力解决该问题。

He has been grappling with the problem for a long time.

长期以来，人类一直在同无情的自然力作斗争。

Man has struggled long against the brute forces of nature.

那位老太太长期以来身体不好。

That old woman has long been in poor health.

冬眠长期以来一直引起生物学家的兴趣

Hibernation has long intrigued biologists.

他们长期以来在工党中就是战友。

They'd long been comrades - in - arms in the Labour Party.

她的工作长期以来太不受重视了。

Her work has been too much ignored for too long.

他长期以来一直努力解决该问题。

He has been grappling with the problem for a long time.

长期以来，我们对他玩忽职守的行为熟视无睹。

We have long enough turned a blind eye to his negligence of his duties.

他说他长期以来一直在想这件事。

He said he's been thinking about if for ages.

专家们长期以来一直关心着世界人口的增长。

Experts have long been concerned about the growth of population in the world.

我们长期以来一直支持绿党保护生态环境的目标。

We have long sympathized with the aims of the Green Party.

我们长期以来一直支持绿党保护生态环境的目标。

We have long sympathize with the aim of the green party.