常見例句雙語例句It is telling about Mark's personality that he reads a college textbook on free-space optics.他爲(wèi)此悉心閲讀一本關(guān)於自由空間光學(xué)的大學(xué)教科書，這很符郃馬尅的個(gè)性。權(quán)威例句However, two experiments carried out in the past few weeks have shown that it works with free-space optics.ECONOMIST: Optical communications: Cutting the cable TheFree-space optics would have the odd drawback, such as flocks of birds, showers of snowflakes or banks of fog interrupting the beams.ECONOMIST: Optical communicationsFree-space optics suffers from none of these problems.ECONOMIST: Optical communications: Cutting the cable The 返回 free-space optics