查询词典 U

In this paper, different leaching procedures were used for the chondrules and chondrule fragments of Semarkona, and the U-Th-Pb compositions of leachates and residues were analyzed by TIMS method. The residues normally give higher 206Pb/204Pb ratio, suggesting higher radiogenic Pb compositions. These residues form a Pb-Pb isochron, and give an age of (4566.9±5.8) Ma with MSWD of 26, consistent to the weighted average age of 207Pb/206Pb model ages.

在本文中，对Semarkona中球粒用不同的化学浸洗流程，并测定浸洗溶液和残渣中U-Th-Pb同位素组成，其中浸洗后的残渣均给出相对较高的206Pb/204Pb比值，表明其中含有较多的放射成因Pb同位素组成，这此残渣构成Pb-Pb等时线，给出年龄为(4566.9±5.8)Ma，MSWD=26，与207Pb/206Pb模式年龄在误差范围内一致。

G U T is one of the leading suppliers of foundry plant design as well as of chromite sand separation equipment.

G U T 是铸造设备设计和铬铁矿砂分离设备领先的供应商。

At first, this age-dating approach was used to estimate the age of G-dwarf stars with Th/Nd chronometry. Recently, it has been used to evaluate the age of halo field stars and globular cluster stars with the Th/Eu and U/Th chronometers.

这种方法最初是利用元素对 Th/Nd 来确定 G 矮星的年龄，近年来开始利用元素对 Th/Eu 和 U/Th 来确定晕族场星和球状星团内恒星的年龄。

One group inhaled 20 ml of 5% atomized sodium chloride solution and 4 000 U of α-chymotrypsin, the other inhaled only 20 ml of 5% sodium chloride solution.

为探讨干咳患者促进排痰的方法，用5%氯化钠溶液20 ml加α-糜蛋白酶4 000 U雾化吸入与单纯5%氯化钠溶液20 ml雾化吸入作比较。

Experimental group received exposure of chymotrypsin at a concentration of 4000 U/mL at tendon suture site, while the control group received a concentration of 0.9％ saline solution.

实验组向鞘管内滴注4 000 U/mL的糜蛋白酶1 mL，对照组采用生理盐水滴注。

The dissolution of offload valve spool: Using circlip pliers remove the valve core and valve located at the junction of the circlip, and then pipe clamp screwed up spool, remove the inside of the cylinder, valves, O-rings, U-type ring, spring and immersed into the cleaning agent, and then split out the valve on the inlet, the whole body into the soaking, this time, the demolition process by Dutch valve has been completed.

拆减荷阀阀芯：用卡簧钳取下位于阀芯与阀体连接处的卡簧，再用管钳拧出阀芯，取出里面的气缸、阀片、O型圈、U型圈、弹簧并放入清洗剂中浸泡，再拆出阀体上的进气口，将整个阀体放入浸泡，此时，减荷阀的拆卸过程已完成。

In the meantime, the client must choose explain the medium that collarband makes get stuck or U aegis regards safe attestation as.

同时，客户必须选择申领口令卡或u盾作为安全认证的介质。

In this paper, firstly the elimination tree theory is introduced in brief, and the structure of Jacobian matrix is determined by use of symbolic factorization; then by use of sparse vector method each column of lower triangular matrix L and each row of upper triangular matrix U are solved.

介绍了消去树理论，并采用符号因子分解技术确定雅可比矩阵的结构，然后采用稀疏向量法求取L阵的每行和U阵的每列。

U The origin of PMD, techniques in PMD compensation, design requirements for adaptive logic control unit are reviewed and summarized compendiously.

u 简明扼要的回顾和总结了PMD的起因、PMD补偿技术、自适应逻辑控制单元的设计要求。

U plate production, with a complete circuit, if the hardware of interest, this is a rare book.

详细说明： u盘制作，并附有完整电路图，如果对硬件感兴趣，这是一本不可多得的好书。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。