But scientists soon realized that genetic maps were less like an instruction manual and more like the parts catalog you get with Ikea furniture.

但科学家们很快意识到，基因图谱不太像一本说明书，而更像是宜家家具的零件目录。

He saw an electronic parts catalog and he wanted to order every part in the catalog.

他看到了一份电子零件目录，他想订购目录中的每个零件。