cotton plug
常见例句
- We've all heard the warning, yet many of us still reach for the cotton swab when we feel a little plugged up.
我们都听到过这样的警告，但我们中的许多人觉得耳朵眼有点堵的时候，仍然要用棉签去掏耳朵。 耳科医生说千万不要这样做。 - Tube strain is first fixed, and after killing hybrid fungi, cooling, cutting strain volva, the strain is transplanted to new culture medium before a cotton cover is plugged.
其转接方法是：先固定试管菌种，经杀灭杂菌并冷却，划割菌种托（钩）菌块后转接新培养基，插盖棉塞。
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