4.the concentration of power in the hands of nobles.
贵族手里中的权力。
5.Conditions in the office made concentration impossible.
办公室的状况根本不可能使人专心
6.With great concentration she went through the movements.
她聚精会神地做完这些动作。
7.nonenzymatic browning of greengage juice was restrained more remarkably by vacuum concentration than by normal pressure concentration;
减压缩较常压缩明显抑制了非酶褐变的发生;
8.concentration on the needs of the young can mean that the elderly are forgotten.
对年轻人需求的注重可能意味着对老年人的忽视。
9.a lapse of concentration in the second set cost her the match.
第二局中她一失神失败了。
10.direct read-out of concentration in ug or mg/l.
以微克/升或毫克/升表示的直接示值读数。
11.total concentration; a total effort; a total fool.
完全中；孤注一掷的努力；彻头彻尾的傻瓜
12.What is the concentration of salt in sea water?
海水中盐的含量是多少？
13.Large concentrations of capital were in the hands of merchants.
大量资本中在商人手里。
14.The result shows that catalyst concentration, reaction time, urushiol concentration and temperatures affect the polymer yield in oxypolymerization of urushiol system.
讨论了该配合作为催化剂，催化漆酚氧化聚合反应时，催化剂、时间、底以及温对漆酚氧化聚合反应的影响。
15.the concentration necessary to her job blotted out all the feelings.
她的工作需要精神中，这使她没有任何感觉。
16.the island has the greatest concentration of seabirds in the north-west.
此岛中了西北部最多的海鸟。
17.too much concentration on set texts can turn pupils against reading.
太注重指定的书本会使小学生讨厌阅读。
18.The vapor phase concentration of durene could be adjusted by the self-made adjustor.
中时间段。
中，聚
，含量
;
，高强
尘
