短語詞組短語zero -degree narratee 零度敘述接受者streaks in zero -degree 零級(jí)條紋zero degree signal 零度信號(hào)zero degree homogeneous 零堦齊次性non -zero degree 非零映射度zero degree interpolation 零次插值zero degree of freedom 自由度爲(wèi)零 返回 zero degree