When astronauts or robot craft finally start bringing home rocks from other planets, those specimens can be compared with Cady's for the tiny thumbprint of life both may contain.
当宇航员或无人驾驶的航天器最终开始从其它行星带回那里的岩石标本时，那些标本将可以与卡迪的标本相对照，以比较两者中可能含有的微小的生命印记。

Form into1 inch size balls and then make a thumbprint in the center of each ball.
做成1英寸大小的球状，在每个小球的顶部压一下。

Single stars of white have bold thumbprint markings on each petal, in shades of pink.
单瓣，白色镶粉红色拇指般大小块状于花瓣端上，星形花

She used an inked thumbprint in lieu of signature.
她用按手印替代签字。