此前一些类似的网站因为过多出现不健康内容而遭到失败，FACEBOOK必须吸取这一教训。
Because before this a few similar websites appear too much insalubrious content and come a howler, FACEBOOK must draw this one lesson.
新屋销售激增和每周失业救济人数下降表明，经济可能不像一些分析师此前预期的那样疲软。
A surge in new home sales and a drop in weekly unemployment claims suggest that the economy might not be as weak as some analysts previously thought.
在此前后，他引进一些用于染布的新技术。
Around this time, he introduced some new techniques for dyeing cloth.
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