engaged in

• In the middle ages a gentleman did not engage in economic production .
  在中世纪，绅士不从事经济生产。
• Yes , he has engaged in international trade . he is an importer .
  是的，他从事国际贸易，他是一个进口商。
• The boat was moored, and the hands busily engaged in taking on wood .
  轮船靠岸抛锚了，工人们忙着往船上装运木料。
• Huck was silent for some time, engaged in a mental struggle .
  哈克呆了一下没有做事，心里左思右想，不知怎么才好。
• He took the bait perfectly, and was soon engaged in an affair with her .
  他一口吞了这个钓饵，不久便同她有了私情。
• She was engaged in a lively, interesting conversation with a faculty wife .
  她同一位教师的妻子谈得很起劲，很有意思。
• He does wholesale business , while his brother is engaged in retail business .
  他经营批发生意，他弟弟则经营零售生意。
• I offered to engage in a candid discussion of the reasoning behind the decision .
  我建议推心置腹地讨论一下做出决定的理由。
• The steward and chambermaid, and all, were busily engaged in cleaning and furbishing .
  船上的男女侍役们都在忙着打扫和擦拭。
• It is a mutual relationship, a true reciprocity we are now engaged in building .
  我们正在建立的是一种相互的，真正互惠的关系。