Definition: the act or process,or a manner of growing; development生長shēng zhǎngOrigin: 1550-1560; See grow,-th; probably cognate with ON grōthrExample:In the Cr7C3,the {013} growth twin was discovered by the electron diffraction patterns and thesecondary ...[繼續(xù)閱讀]

    Definition: A brown glassy mineral that occurs as hexagonal prisms often twinned in theshape of a cross. It consists of a silicate of aluminium and iron.十字石shí zì shíFormula:(Fe,Mg,Zn)2Al9(Si,Al)4O20(OH)4Origin:early 19th century:from Greek stauros “cross...[繼續(xù)閱讀]

    Definition:a set of principles on which the practice of an activity is based 理論 lǐ lùn;學(xué)理xué lǐ,原理 yuán lǐOrigin:late 16th century (denoting a mental scheme of something to be done):via late Latinfrom Greek theōria “contemplation,speculation”,from theōros...[繼續(xù)閱讀]

    Definition: an orange-yellow mineral consisting of a molybdate of lead,typically occurringas tabular crystals鉬鉛礦mù qiān kuàng (又稱彩鉬鉛礦)Formula: PbMoO4Origin: mid 19th century: from the name of F. X. von Wulfen (1728-1805),Austrianscientist,+-iteExample:Wul...[繼續(xù)閱讀]

    Definition:In complex geometry,the term positive form refers to several classes of realdifferential forms of Hodge type (p,p).正形zhèng xíngExample:P wave in leads Ⅰ,Ⅱ,Ⅲ and aVF is of positive form and that in aVR and aVL,of negativeform.P波的形態(tài)在Ⅰ,Ⅱ,Ⅲ及aVF導(dǎo)聯(lián)中呈...[繼續(xù)閱讀]

    Definition: In mathematics,closed form may refer to: closed-form expression,a finitaryexpression and closed differential form,a differential form α with the property that dα=0.閉形bì xíngExample:This paper presents a closed form analysis method of nonlinear...[繼續(xù)閱讀]

    Definition:(堿性角閃石jiǎn xìng jiǎo shǎn shí) any of a class of rock-forming silicate oraluminosilicate minerals typically occurring as fibrous or columnar crystals閃石shǎn shíFormula:閃石(Ca,Na) 2-3 (Mg2+,Fe2+,Fe3+,Al3+)5[(Al,Si)4O11](OH)2Origin:閃石early 19th cen...[繼續(xù)閱讀]

    Definition: a dark brown,black,or green mineral of the amphibole group consisting of ahydroxyl alumino-silicate of calcium,magnesium,and iron,occurring in many igneous andmetamorphic rocks普通角閃石pǔ tōng jiǎo shǎn shíFormula:NaCa2(Mg,Fe,Al)5〔(Si,Al)4O11〕2(OH...[繼續(xù)閱讀]

    Definition: a white to grey amphibole mineral which occurs widely in igneous rocks and ischaracteristic of metamorphosed dolomitic limestones透閃石tòu shǎn shíFormula:Ca2Mg5Si8O22(OH)2Origin:late 18th century:from Tremola Valley,Switzerland,+-iteExample:Laoz...[繼續(xù)閱讀]

    Definition:(Mineralogy) a particular kind of sorosilicate; a mineral of the melilite group.Minerals of the group are solid solutions of several endmembers,the most important of whichare gehlenite and akermanite.鈣鋁黃長石 gài lǚ huáng cháng shíFormula:(CaNa)2(...[繼續(xù)閱讀]