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1·This school year, the schools shifted from hard cover to electronic textbooks for social studies in its middle and high schools.

本学年，这些学校的初中和高中的社会研究教材从纸质教材转向了电子教材。

2·Time magazine has put on its cover, presenting the courage and hard work of common people.

《时代》杂志的封面展示了普通人的勇气和努力。

3·Which is why it's so hard to predict bestsellers, why you can't judge a book by its cover.

这就是为何预测畅销书很难，为何你们不能根据一本书的封面来对它作出评价。

4·Books can be hard or soft cover, and trim sizes range from a small 7 square books to large, coffee-table-size 12 square books.

你可以选择硬皮或软皮封面，还可以调整书本尺寸从七寸手掌书到适合摆放咖啡桌上的12寸大的书。

5·Greyboard (hard board for the cover).

硬卡纸(用作封面)。

6·But a bank's reported earnings aren't a hard number, like sales; for example, they depend a lot on the amount the bank sets aside to cover expected future losses on its loans.

但是，银行报表中的收益并不是类似销售额这样的“硬数据”。这些收益在很大程度上取决于银行拨备的，用来弥补预期未来贷款损失的资金额度。

7·Blogs are now so popular that it's very hard to find a niche that isn't already saturated. There are probably dozens or hundreds of other bloggers writing on the topics you cover.

博客现在如此受欢迎，你很难找到一个未饱和的细分领域，很可能已有数十或数百其他博客作者已经就你涉及的主题进行写作了。

8·Kezai started receiving professional tennis coaching at the age of eight. Since then his father has worked hard to cover his training costs.

(美国有线新闻网络)——柯仔在八岁时就开始接受专业的网球训练，从那时起，他的父亲就通过辛勤工作来支付他的训练费用。

9·Without Obama being able to leverage some Republican votes, it is going to be very hard to get a good plan to cover all Americans with health care.

如果奥巴马无法撬动共和党的票数，那么就很难获得一个覆盖全美国的医疗保障计划。

10·Having said that, it's also true that doctors may have a hard time keeping up with all the new research - especially family doctors who have to cover a wide range of different medical problems.

话虽如此，医生可能很难跟上所有新的研究-特别是家庭医生不一定了解不同的医疗领域。