Though white-haired, I would still both sing and drink my fill. 这里的though white-haired

With verdure spring's aglow; tis time we homeward go. Sail all the way through Three Gorges in a day.

不愧是杜甫的“生平第一快诗”！

Rolling up  my verse books, my joy like madness looks.

Up and down, up and down...

Reading this poem, I find no trace of grief.

Tears, yes, tears, but they just wept tears of joy. 

附：

Tis=It is 

verdure<文>青翠的草木；新鲜；繁盛；朝气