If you're eating and want to take a sip, dab your mouth with your napkin to avoid staining the rim of the glass.
如果你在吃东西的时候，想要啜一口饮料的话，那就先拿餐巾把嘴擦干净了，以免在杯子边缘留下残迹。
2
Methods Immunoenzymatic staining and triple antigen glass slide were adopted for immunoassay of schistosomiasis, malaria and filariasis, as well as blood test of plasmodia.