Researchers are projecting a westward expansion of " Cactoblastis cactorum" in North America.

研究人员计划在北美向西扩展“仙人掌螟疫病菌”。

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The story of westward expansion as told from Tonto's perspective isn't entirely accurate historically.

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That kind of attitude helped fuel America's great westward expansion, and the idea of that journey informs Americana Symphony.

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Fortunately, vast pine forests in Wisconsin and Michigan could be cut and shipped down Lake Michigan to Chicago to support this westward expansion.

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