su·per·na·tant /ˌsupɚ/
(a.)浮在表面的
su·per·na·tant /ˌsupɝˈnetṇt/ 名詞
浮于上層的,浮于表層的,上層清液,上清液,上浮物,浮在表層的
Su·per·na·tant a. Swimming above; floating on the surface; as, oil supernatant on water.
supernatant
adj : of a liquid; floating on the surface above a sediment or
precipitate; "the supernatant fat was skimmed off"
n : a liquid lying above a sediment (floating on the surface)