Corn is extensively used as feed for livestock, and because profit margins are tight in the livestock business, many farmers are expected to leave the business.
玉米被广泛用作牲畜饲料，由于畜牧业的利润率很低，许多农民预计将退出这一行业。
Dr Salvador Jorgensen, of Stanford University's Hopkins Marine station, found that in winter, sharks leave seal colonies, where they feed all summer, and set off for warmer waters.
斯坦福大学霍普金斯海洋站的萨尔瓦多·乔根森博士发现，冬天，食人鲨会离开海豹聚居地(整个夏天它们都在那里以海豹为食)，动身前往温暖的水域。
Dr Salvador Jorgensen, of Stanford University's Hopkins Marine station, found that in winter, sharks leave seal colonies, where they feed all summer, and set off for warmer waters.
斯坦福大学霍普金斯海洋站的萨尔瓦多·乔根森博士发现，冬天，食人鲨会离开海豹聚居地(整个夏天它们都在那里以海豹为食)，动身前往温暖的水域。
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