1.and there has not been any way to understand how these things contribute to the disease.
contribute to 有助于;捐獻(xiàn);促成
She is exuberating in the knowledge of having contributed to victory.
她知道自己對勝利有所貢獻(xiàn)而顯得沾沾自喜 。
Natural disasters have obvi-ously contributed to the continent's economic crisis.
很顯然,自然災(zāi)害也是造成該大陸經(jīng)濟(jì)危機(jī)的原因之一 。