231.emerge from (=appear， become known) 出现，暴露(问题，意见等)
232.place (or put， lay) an emphasis on 强调，把重点放在……上
233.encourage sb. in 鼓励;encourage sb. in his/her work 鼓励某人工作;encourage sb. in his/her idleness 怂恿某人游手好闲
234.encourage sb. in ……with sth. 用……鼓励某人做某事
235.on end (=continuously) 连续地
236.(be) at an end (=finished) 结束了
237.no end of (=very many/much) 很多，大量
238.in the end (=finally， eventually) 最终
239.at one‘s wit’s end (=not knowing what to do or to say) 无法可想，智穷计尽
