already a long time ago

I already solved the same problem on the Aardvark project a long time ago.

很久以前在土豚项目中我就已经解决了相同的问题。

The discovery of the expansion of our Universe was already noticed by astronomer Hubble a long time ago in 1929, forcing Einstein to revise his famous equations about space, time and masses.

早在1929年，宇宙正在膨胀这一现象就已被天文学家哈勃所注意到，这让爱因斯坦不得不修改了他那项关于空间、时间和质量的著名方程式。

Although our Japanese colleagues have already described small cell dysplasia a long time ago and many pathologists look for it but I think clinicians don't take this into account enough.

虽然我们的日本同行已经描述了小细胞不典型症，而且很多病理学家也对此进行了研究，但是我认为临床医生还没有充分重视这种情况。