1. By this time, a Lancaster bomber in reasonable condition was rare and worth rescuing.
    到了那个时候，状况良好的兰开斯特轰炸机实属罕见，值得抢救。

2. It is quite reasonable to regard the sea floor as the basic form of the crust of the earth, with, superimposed upon, it the continents, together with the islands and other features of the oceans.
    因此完全有理由把海床看作地壳的基本模壳，上面附加着大陆以及岛屿和海洋的其他形态。

3. The laws are based either on "community property" (split evenly) or on "reasonable distribution" (whatever a judge thinks is "fair").
    这些法律要么是基于"共有财产"（平均分配），要么是基于"合理分配"（法官认为怎样"公平"就怎样分）。

4. These children showed a reasonable level of happiness and were very alert during periods of study.
    这些孩子显示了相当不错的快乐感，在学习过程中反应也很敏捷。

5. No reasonable person could refuse.
    凡是明事理的人都不会拒绝此事.

6. As a reasonable guess, they might, on an average, be 100 light years away.(A light year is the distance which light travels at 186,000 miles per second in one year, namely 6 million million miles.)
    据合理推算，外星人离我们平均距离也有100光年之远（1光年是光以每秒186，000英里的速度在一年内走的距离，即6万亿英里）。

7. Cloning is a radical challenge to the most fundamental laws of biology, so it's reasonable to be concerned that it might be a preface to activities that will threaten human society and dignity.
    克隆向生物学最基本的规律发起了一次革命性的挑战，因此有理由担心这或许是威胁人类社会和人类尊严的活动的序曲。

8. On the contrary, officials of another government bureau report, "no reasonable explanation to date has been made for the vanishings."
    与此相反，另一家政府部门的官员报告："迄今为止，还没人对失踪事件做出合理的解释。

9. Let's assume they come from the "unconscious." This is reasonable, for psychologists use this term to describe mental processes which are unknown to the individual.
    我们姑且假定它们是来自"潜意识"吧。这是有道理的，心理学家就是用这一术语来描述不为人知的思维过程。

10. In 95 percent of the cases a sympathetic, reasonable decision can be made after appropriate discussion.
    有95%的病例，在恰当磋商之后，都能做出人道而合理的决定。