In 1818 Fresnel entered a competition sponsored by French Academy.1818年菲涅耳参加了法国科学院主办的一次竞赛.The difficulty was resolved by Fresnel with his addition of the concept of interference.菲涅耳通过加进来干涉概念,解决了这个困难.In many cases, the Si...
If they carry on sinking boreholes then the land is likely to subside.如果他们继续钻洞，地表很有可能下沉。The correctness of the result was proved by some underground boreholes.经过少量的井下钻孔验证,证实了结果的正确性.This paper describes the substance a th...
Seven fire brigades were deployed to contain the blaze.7支消防队被派来控制火势。We destroyed about 25 brigades in the next three months.在以后的三个月中,我们歼灭了大约二十五个旅.These are present in both conventional and nuclear missile brigades.无论是常规导...
Children went on a picnic and frolicked in a field.孩子们去野餐,在田野上嬉闹.The children frolicked in the garden ; the gamboling lambs in the meadows.孩子们在花园里嬉闹.The children frolicked in the garden.孩子们在花园中嬉戏....
种间杂交的主要障碍是F1代的不育性.A major barrier to interspecific hybridization is sterility in the F 1 progeny.因此,向日葵细胞质雄性不育性的研究备受关注.That is why cytoplasmic male sterility ( CMS ) in sunflower is the research focus through years....