老骥伏枥志在千里

(lit.) an old steed in the stable still aspires to gallop 1000 li
(fig.) old people may still cherish high aspirations

劳动力, 劳动者, 劳工, 牢固, 劳教, 牢牢, 劳累, 铑, 栳, 潦, 姥, 佬, 老, 老百姓, 老板, 老伴儿, 老兵, 老二, 老公, 老虎, 老家, 姥姥, 老两口, 老年, 老年人, 老牌, 老婆, 老人, 老师, 老是, 老鼠, 老套, 老天爷, 老头, 老挝, 老兄, 老爷, 老资格, 烙, 络,