1. It is no use offering the manual labourer, tired out with a hard week´s sweat and effort, the chance of playing a game of football or baseball on Saturday afternoon.
    对于流汗出力干了一周苦活的体力劳动者来说，让他们在星期六下午再踢足球或打垒球是不合适的；

2. It seems that man was making a real effort to understand the seasons 20,000 years earlier than has been supposed.
    看来人类早就致力于探索四季变迁了，比人们想像的要早20,000年。

3. If the term sounds unscientific to 20th-century ears, let us remember there is a definite connection between marshy lands and malaria, and that the naming of the disease itself perhaps represents a praiseworthy effort of observation.
    尽管对20世纪的人来说，“坏空气”一词听起来不科学，我们应该记得沼泽地和疟疾之间有着肯定的联系，因此，“坏空气”一词自身也许代表着一种值得称道的观察。

4. I remembered once, at a family reunion, when my daughter was two, that my father picked her up for a minute -- long enough for me to photograph them -- but the effort was obvious.
    我记得有一次全家聚会，当时我女儿才2岁，他抱了她一会儿，好让我有时间给他俩拍张照片。

5. In fact, many students say it requires much more time and effort.
    事实上，许多学生说它需要花更多的时间与努力。

6. In three years of day and night effort, Bell figured out how to send sound over a changing electric current.
    经过三年夜以继日的努力，贝尔弄清了如何通过波动的电流传送声音。

7. For each course, students get a grade for academic achievement and for "best effort".
    在每门课程中，学生都会得到一个综合了学习成绩和"努力程度"的分数。