beam up at sb冲着某人微笑
high beam teletherapy at高剂量率
beam programs at Russia向苏联广播
beam equation at resonance梁方程共振
Beam diameter at aperture出光孔处光斑直径;光束直径;出口光斑
beam fixed at both ends两端固定梁
beam fixed at one end一端固结的梁;一端固定梁
beam supported at both ends两端支承梁;端托梁
Beam diameter at the aperture光斑直径