The racers are mostly old people in their sixties .
那些赛跑者大多数是六十多岁的老人。
The british researcher fought the disease in africa in the nineteen fifties and sixties .
这位英国研究人员二十世纪五六十年代曾在非洲抗击牛瘟。
America 's civil war in the eighteen sixties did not have the full support of the people . Many said they did not care who won -- north or south . They just wanted to be left alone .
