她开始用钢琴演奏那首民歌.She struck up a folk melody on the piano.应观众再唱一曲的要求, 他清唱了一首民歌.For an encore, he sang an unaccompanied folk song.她在哼一首我以前从未听过的民歌.She is humming a folk song that I never heard before....
a refinement in the masonry石工技艺的改进The fall of masonry crushed the old man in the old house.炉墙倒坍将那老人压倒在旧房屋里.Brick masonry walls built with a technique known as reinforced grouted brick masonry performed excellently.用新的施工技...
光线用棱镜 、 光栅或干涉仪分解.The light is resolved by prisms, gratings, or by an interferometer.光栅摄谱仪有两种类型.The grating spectrograph is built in two designs.光栅由金属或丝制造.The grating are made of rods or wire....