powdery substance 中文意思是什麼
powdery substance
解釋
粉末狀物質-
The physical attributes of an in - service valve with dezincification includes a white powdery substance or mineral stains on its exterior surface
應用中的閥門出現脫鋅現象的物理特徵是,在產品表面出現粉狀物質或礦物污點。 -
A letter containing a powdery substance is believed to be the source of the anthrax becteria that showed up as a skin rash on an nbc employee
一封帶有粉狀物質的信件被確定為炭疽熱細菌的來源,因為一位nbc雇員已經由此得了皮炎。
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