forensics officers in salisbury taking samples from railings and a metal pole near the site of the poisoning of sergei and yulia skripal - 科學樣本 個影片檔及 b 捲影像00:20
scientists collecting samples from the river mersey to check for microplastics - 科學樣本 個影片檔及 b 捲影像00:15
microplastics visible under a microscope from samples taken from the river mersey - 科學樣本 個影片檔及 b 捲影像00:10
