The early sun shone serenely on embrowned groves and still green fields.朝阳宁静地照耀着已经发黄的树丛和还是一片绿色的田地.His hands were embrowned like those of a common laborer.他的一双手象农场工人的手那样是古铜色的....
物理学研究力学、热学 、 光学 、 声学和电学.Physics studies mechanics , heat, light, sound and electricity.这两个学生都做了不少电学实验.Both students have made quite a few experiments on electricity.从量子电动力学可以得出所有已知的电学 、 力学和化学定律.Out of quantum electrodyna...