146. conceive of (think of, imagine, consider)設想
a) Half a century ago it’s difficult to conceive of travelling to the moon半個世紀前去月球旅行是難以想象的。
147. be concerned with (=about) 關心 關注
a) We're rather concerned about father's health. 我們相當擔心父親的健康。
148. concern oneself about 關心 (concern及物)
a) We're rather concerned about father's health.
b) 我們相當擔心父親的健康。
149. concern oneself with 關注
a) to concern oneself with public work 關心公眾事務
150. in conclusion(=as the last thing) adv最后, 總之; at the conclusion of 當…結束時;
a) In conclusion, walking is a cheap, safe, enjoyable and readily available form of exercise.