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Some students find it difficult to concentrate in large lecture classes and find reading quietly a more effective way of studying.

一些学生发现很难在大班授课时集中精力，安静地读书时更有效的学习方法。

While the more serious newspapers have a lot of home and international news, some of the more popular "tabloids"(so-called because of their size) concentrate on the more spectacular and scandalous aspects of life in Britain.

严肃的报纸报道许多国内外的新闻，流行的&小报&则注重报道英国社会的辉煌和丑闻。

While the more serious newspapers have a lot of home and international news, some of the more popular "tabloids"(so called because of their size) concentrate on the more spectacular and scandalous aspects of life in Britain.

严肃的报纸包括许多国内外的新闻，流行的&小报&则注重报导英国社会生活的辉煌和丑闻。

We forget the main thing and concentrate on the most trivial.

我们把最紧要的抛却脑后，然后去在乎那些最微不足道的事情。

We forget the main thing and concentrate on the most trivial.

我们把最紧要的拋却脑后，然后去在乎那些最微不足道的事情。

When there's a lot of stuff going on around you when you need to concentrate on a creative task, it mucks around for something to interrupt your concentration, and as soon as it's found something, all that has gone wrong in your life seems to run like a film before your eyes.

当你需要集中精神在一件创造性的任务上时，却有很多杂念围绕着你，它会干扰你的专注，一旦看见某样事物，你生活中的事情就会像电影在你眼前闪过。

Don't worry, the rest of your life will just fly by if you concentrate on changing nappies and not trying to escape in any way.

别担心，如果你专心换尿布的话，余下的生命会过得很快的。别指望能逃出去。

I could get neater script with fountain pens than with biros but often I had to concentrate.

我能得到整洁脚本钢笔比biros ，但往往我不得不集中精力。

Secondly, the works having been done concentrate on numerating environment protection activities; therefore, the author thinks current researches are staying on identification stage rather than on classification stage.

第二，就目前所完成的工作来看，主要是列举各种环保活动，这与其说是环保活动的分类，可能不如说还只是停留在环保活动的确认阶段。

Fortunately, more and more documents which concentrate on the product market influence to capital structure emerged recent years, most of them took the oligopolies as objects.

所幸的是，近年来，从产品市场视角对资本结构影响因素进行的研究逐渐开始受到重视，其中相当一部分研究集中于寡头企业。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。