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1.make contribution to 为…作贡献
例句:What's more, improve our ability to make contribution to the human beings.
还有提升自己的能力来为人类做贡献。
2.toxic chemical 有毒化学品
例句:They're promising to trace any other products that might have been tainted by the toxic chemical.
他们承诺查处任何可能受这种有毒化学品污染的其他产品。
3.associated with 与…有关系
例句:Cigarette smoking has been associated with lung cancer.
肺癌被认为与吸烟有关。
4.lead to 导致
例句:Heart failure led to her father's death.
心力衰竭导致她父亲的死亡。
