146. conceive of (think of, imagine, consider)设想

　　a) Half a century ago it’s difficult to conceive of travelling to the moon半个世纪前去月球旅行是难以想象的。

　　147. be concerned with (=about) 关心 关注

　　a) We're rather concerned about father's health. 我们相当担心父亲的健康。

　　148. concern oneself about 关心 (concern及物)

　　a) We're rather concerned about father's health.

　　b) 我们相当担心父亲的健康。

　　149. concern oneself with 关注

　　a) to concern oneself with public work 关心公众事务

　　150. in conclusion(=as the last thing) adv最后, 总之; at the conclusion of 当…结束时;

　　a) In conclusion, walking is a cheap, safe, enjoyable and readily available form of exercise.