Shí / yàn / jié / shù / hòu / yán / jiū / rén / yuán / bǎ / yàng / pǐn / zhōng / de / cán / liú / wù / sòng / qù / jiǎn / cè实验结束后,研究人员把样品中的残留物送去检测。After the experiment, the researchers sent the residue in the sample for testing.