The goal is to document the number of meetings between large meat-eating animals.

目的是记录大型食肉动物之间相遇的次数。

The researchers documented the number of microdebris-measuring between 2 and 5 millimeters-and larger pieces, like wood, metal and plastic, on 25 beaches in 2017.

研究人员记录了2017年25个海滩上的微碎片(测量范围在2到5毫米之间)和更大的碎片(如木头、金属和塑料)的数量。