saw so many children of sound mind and body. 4)deep and peaceful (in sleep 昨天干了一整天的体力活,夜里睡得很沉。 (Yesterday I did the labor work the whole day and had a sound sleep in the night Collocation: a sound foundation牢固的基础 a sound economy殷实的经济 sound reasoning符合逻辑的推理 a sound sleep酣睡 a sound mind健全的头脑 18. circulation : n 1)the flow of gas or liquid around a closed system, esp the movement of blood through the bod The improved blood circulation enables practitioners to perform tasks in a more vigorous and healthy manner. natural chemicals which make you feel relaxed and invigorate ease the Taking moderate exercise will stimu late your circulation and rel 2 the passing of something, such as money or news, from place to place or person to person The Wall Street Journal boasts the largest daily paper circulation,a little less than two million The Treasury Department plans to remove old coins from circulation and replace them with new ones Collocation blood circulation血液循环 newspaper circulation报纸发行量 currency circulation货币流通 enjoy a huge circulation畅销 withdraw from circulation停止发行;停止流通 19. distraction: n. something or someone that distracts, esp. an amusement More importantly, urban development was regarded as a distraction from the real issues of environment and development. Mrs Smith planned to fin ish the final draft of her paper, but her baby's constant crying drove her to distraction 宿舍里使人分心的事物太多,使我难以集中精力学习。 (There are too many distractions in the dorm for me to concentrate on my study. 20. keep pace with: move, increase, change, etc. at the same speed as sb /sth9 saw so many children of sound mind and body.) 4) deep and peaceful (in sleep) 昨天干了一整天的体力活，夜里睡得很沉。 (= Yesterday I did the labor work the whole day and had a sound sleep in the night.) Collocation: a sound foundation 牢固的基础 a sound economy 殷实的经济 sound reasoning 符合逻辑的推理 a sound sleep 酣睡 a sound mind 健全的头脑 18. circulation: n. 1) the flow of gas or liquid around a closed system, esp. the movement of blood through the body * The improved blood circulation enables practitioners to perform tasks in a more vigorous and healthy manner. * Taking moderate exercise will stimulate your circulation and release the natural chemicals which make you feel relaxed and invigorated. 2) the passing of something, such as money or news, from place to place or person to person * The Wall Street Journal boasts the largest daily paper circulation, a little less than two million. * The Treasury Department plans to remove old coins from circulation and replace them with new ones. Collocation: blood circulation 血液循环 newspaper circulation 报纸发行量 currency circulation 货币流通 enjoy a huge circulation 畅销 withdraw from circulation 停止发行；停止流通 19. distraction: n. something or someone that distracts, esp. an amusement * More importantly, urban development was regarded as a distraction from the real issues of environment and development. * Mrs. Smith planned to finish the final draft of her paper, but her baby’s constant crying drove her to distraction. 宿舍里使人分心的事物太多，使我难以集中精力学习。 (= There are too many distractions in the dorm for me to concentrate on my study.) 20. keep pace with: move, increase, change, etc. at the same speed as sb./sth