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1.make sure 证实
例句：And you have to make sure, what I always say.
所以我经常说，你要确保良好的工作环境。
2.tooth decay 齵齿
例句：Brushing your teeth regularly to guard against tooth decay.
经常刷牙，预防龋齿。
3.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。
4.soda pop 汽水
例句：He used to go door-to-door and sell soda pop.
那时他常常挨家挨户地推销苏打汽水。
