偏转散焦defocusing: 发散; 散集; 散焦,去焦; 散焦现象(电讯); 散焦作用axial defocusing: 轴向离焦beam defocusing: 束流散聚defocusing amount: 离焦量defocusing attenuation: 散焦衰减下载手机词典可随时随地查词查翻译