positive cause的用法和樣例：
例句
- The actual cause of melasma is unknown, but it is known to be related to both hormonal levels and exposure to sunlight.
黃褐斑的實際原因還不清楚，但它是已知的有關這兩個激素和暴露於陽光下。
positive cause的相關資料：
臨近單詞
positive cam
positive
positively charged liquid film electrode
positive-displacement expansion engine
POSITIVE CLUTCH PISTOL GRIP SCREWDRIVERS
positive deviation and negative deviation
positive pressure central air conditioner
Positive Combat Identification Task Force
positive occipital sleep transient sharps
positive and negative feedback regulation
positive definite Hermitian inner product
positive infinitely variable driving gear
