这都是他的经验之谈：埃切瓦里亚是波多黎各人，在纽约市南布朗克斯区一个贫穷的单亲家庭里长大，他的经历比大多数人都要艰难。
He speaks from experience: After growing up poor in a single-parent home in New York City's South Bronx, Echevarria, who is Puerto Rican, faced a tougher struggle than most.
它还可以与南乌拉尔、西伯利亚、北美、北非和阿拉斯加半岛等地区的中里 菲 界上部—上里 菲 界下部层位中的叠层石组合对比。
It could also be correlated with that in the upper horizon of the Middle Riphean—lower horizon of the Upper Riphean in South Ural Mountains and Siberia of Russia, North Africa, and Alaska Peninsula.
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