1.office hours 办公（门诊等）时间
例句：She dreamt away the office hours.
她在想入非非中混掉办公时间。
2.Olympic team 奥运代表队
例句：The Olympic team finished with the top medal count of 110 medals.
美国奥运队获得的奖牌数最多，达到110枚。
3.on (the或an) average 按平均值,通常
例句：It is higher, on average, in some places than in others.
有些地方的平均智力水平比其它地方更高。
4.on a diet 节食
例句：The fat boy went on a diet to get rid of his excess weight.
这个胖男孩节制饮食以减轻过量的体重。
5.on a large scale 大规模地（的）
例句：This applies on a large scale as well.
这在更大范围上也同样适用。
6.on account of 因为，由于
例句：The flight was postponed on account of bad weather.
因为天气恶劣， 飞行延期了。