By this process enormous amounts of mud and rock are moved from the land to the sea.each year the Mississippi Rivercarries 730 million of solid matter into the Gulf of Mexico.
通过这一过程，巨量的泥沙和石块从陆地移入海洋。每年，密西西比河要把7.3亿吨的固体物质送入墨西哥湾。
Heavily into mountaineering and rock climbing, I lived and climbed everywhere, from crags outside Seattle to volcanoes in Mexico.
大量地登山、攀岩，从西雅图周围的峭壁到墨西哥的火山，到处都留下了我生活和登攀的身影。
This glassy one is found in volcanic rock. In fact, I found it in New Mexico on a collecting trip.
这个像玻璃一样的矿石是在火山石里面发现的，实际上，我是在新墨西哥州收集旅行中发现的。
Metallurgy focused on copper, gold, and silver. archaic inscriptions on rocks and rock walls all over northern Mexico demonstrate an early propensity for counting in Mexico.
衍金主要是在铜、金、和石头与石墙的古老银刻文，显示墨西哥早期就有运算潜力。
Metallurgy focused on copper, gold, and silver. archaic inscriptions on rocks and rock walls all over northern Mexico demonstrate an early propensity for counting in Mexico.
衍金主要是在铜、金、和石头与石墙的古老银刻文，显示墨西哥早期就有运算潜力。
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