短語詞組短語beam up at sb 沖著某人微笑high beam teletherapy at 高劑量率beam programs at Russia 向蘇聯(lián)廣播beam equation at resonance 梁方程共振Beam diameter at aperture 出光孔處光斑直徑;光束直徑;出口光斑beam fixed at both ends 兩端固定梁beam fixed at one end 一端固結(jié)的梁;一端固定梁beam supported at both ends 兩端支承梁;端托梁Beam diameter at the aperture 光斑直徑 返回 beam at