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The precursor powder materials were sintered by pressureless treatment at 600℃ and 900℃, respectively. XRD results show that the powder is in the form of a single cubic fluorite structure when sintered at 600℃.

在600℃和900℃下分别对初始粉体进行无压煅烧，XRD表明，在600℃时形成了单一的立方萤石结构。

Gcm2 is required for the differentiation and survival of parathyroid precursor cells in the parathyroid/thymus primordia.

Gcm2在甲状旁腺/胸腺始基中对于甲状旁腺前体细胞的分化和存活是必要的。

Like, say, the Puckle Gun - a precursor of a machinegun that could fire nine rounds a minute.

比如说，帕克尔转膛枪——一种机枪的雏形，可以一分钟内发射9颗圆形弹。

For the above purposes, using a tailored cyanometalate precursor,(1) Tp=hydrotris (pyrazolyl borate; Bu〓N〓=tetrabutylammonium cation , two trinulear complexes,〓(2),〓(3; cyclam: 1, 4, 8, 11-tetraazacyclotetradecane), two one-dimensional polymers,〓(4; dien: diethylenetriamine),〓(5), and a cluster 〓(6) have been synthesized and characterized structurally and magnetically.

基于上述研究热点，我们以修饰的氰基金属化合物(1)为构筑基元（Tp：三吡唑基氢硼烷，Bu〓N〓：四丁基铵离子），合成了两个杂三核化合物，〓(2)，〓（3；cyclam：1，4，8，11-四氮环十四烷），两个一维聚合物，〓（4；dien：二乙烯三胺），〓(5)，和一个十四核簇合物〓(6)。

The experiment shows,the Pyrochlore Phase can be rid of by the precursor synthesis.

结果表明，前驱体合成工艺能够在合成过程中避免焦绿石相的生成。

After coating the solutions on the substrates, the precursor films will go through a heat treatment to pyrolyze the polymer and form solid films, In this paper, we show some representative oxide and nitride films grown by PAD, including simple oxide/nitride such as TiO2, GaN, A1N and complex oxide/nitride such asTiO3 and Ti(subscript 1-x)AlN.

该文介绍了使用该方法制备的一些具有代表性的氧化物和氮化物薄膜，包括简单氧化物／氮化物，如TiO2、GaN和AlN等，复杂氧化物／氮化物如（Ba，SrTiO3、Ti(下标 1-x)AlN等。

Ultra-thin freestanding polyimide films of 100 nm thickness were formed by sequential evaporation of 4,4'-diaminodiphenyl ether and pyromellitic dianhydride precursor monomers followed by a thermal treatment of 150 ℃ 1 h and 350 ℃ 2 h.

采用分层蒸镀法，在玻璃基片上依次蒸镀二氨基二苯醚和均苯四甲酸二酐两种单体，然后在空气环境中对样品进行不同温度和时间的热亚胺化处理，使二者在交界面上反应生成聚酰亚胺。

With the in-situ single-stage self-metallization protocol,surface-silvered polyimide film has been prepared using pyromellitic dianhydride/ 4,4\'-oxydianiline-based polyimide as the matrix and (1,1,1-trifluoro-2,4-pentadionato)silveras the silver precursor.

在原位一步自金属化法中，以均苯四甲酸酐/4，4\'-二胺基二苯醚基聚酰亚胺为基体，以三氟乙酰丙酮银作为银的母体制备出了表面金属化的聚酰亚胺银复合薄膜。

Quinolinic acid is an endogenous neurotoxin, that activates the N-methyl-D-aspartate receptor and the biosynthesis of NAD+ precursor.

Quinolinic acid是一种内生性的神经毒素，活化N-methyl-D-aspartate接受器以及在生物合成NAD+的前驱物。

The Mississippi scheme was a precursor of modern attempts to reflate the economy with unorthodox monetary policies.

曾经的密西西比计划正是现代种种实现通货再膨胀的非常规货币政策的前身。与近来

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。