查询词典 radium

A mineral consisting of uranium oxide and trace amounts of radium and thorium and polonium and lead and helium; uraninite in massive form is called ''.

一种含有氧化铀和少量镭、钍、钋、铅、氦的矿物；块状的晶质铀矿称为沥青铀矿，是主要的铀矿石。

A yellow radioactive mineral; an ore of uranium and radium and vanadium .

一种黄色的放射性矿物；一种由铀、镭、钒混合而成的矿石。

The radiation radius of the radioactive radium radi ator in the stadium is varia ble.

有放射性的镭辐射体在广场中的辐射半径是可变的。

The radium of the two platform become the same and the two angle of the links one of them near 120° another near 0°, the error prominency factors become small.

两平台半径越接近或分支末端两两越趋于一点时，位姿误差放大因子越小。

The result shows that the resistance of tree species at the same site closely related to the number of vessel, rays' width, radium of lignified cell and wall thickness of sclereids, and the anatomical structure of the same tree species was different at different sites.

结果表明，不同树种在同一立地条件下的导管个数、射线宽度、木化细胞半径及韧皮部石细胞壁的厚度与树种的抗虫性密切相关；同一树种在不同立地条件下其内部解剖结构有所不同。

The result shows that the resistance of tree species at the same site closely related to the number of vessel, rays' width, radium of lignified cell and wall thickness of sclereids, and the anatomical structure of the same tree spec...

结果表明，不同树种在同一立地条件下的导管个数、射线宽度、木化细胞半径及韧皮部石细胞壁的厚度与树种的抗虫性密切相关；同一树种在不同立地条件下其内部解剖结构有所不同。

It is rare in nature because all its isotopes are short-lived and because radium, its source, is scarce.

在自然界很稀少，因为它所有的同位素都是短寿命的，还因为它的来源是稀有的。

Low rotten bituminous coal (jet coal, it glues coal to be and weak to glue coal), natural radioactive level lower,( 238U: 33.2- 50.0Bq/kg , 232Th: 52.5- 54.4Bq/kg , 226Ra: 30.6- 56.5Bq/kg ), obviously lower than the brown coal than activity, and the uranium , radium which the companion grew is in a basic balance, uranium , thorium are also in a basic balance.

低变质烟煤（包括长焰煤、不粘煤和弱粘煤）天然放射性水平较低，（238U：33.2～50.0Bq/kg、232Th：52.5～54.4Bq/kg、226Ra：30.6～56.5Bq/kg），比活度明显低于褐煤，且伴生的铀、镭基本平衡，铀、钍亦基本平衡。

A complex brownish - black mineral,UO2,forming the chief ore of uranium and containing variable amounts of radium,lead, thorium ,and other elements.

沥青铀矿黑褐色的合成矿，UO2，主矿为铀，还包括不定数量的镭、铅、钍和其他元素

Her head is uptilted, her throat wide open; she is all alert and tingling with the shower of sparks that burst from the radium symphony.

她昂着头，大张着嘴，注意力十分集中，这曲交响乐像镭一样放射出一阵阵火花，使她激动不已。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。