三次曲線的切線割點(diǎn) tangential point: 不重要的點(diǎn); 切點(diǎn)tangential image point: 切向像點(diǎn)tangential point load: 切向點(diǎn)荷栽; 切向點(diǎn)荷載cubic average boiling point: 立方平均沸點(diǎn)cubic point group: 立方點(diǎn)群下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯