Different quantitative Methods : Were developed for the determination of carbon tetrachloride in order to improve accuracy.

Carbon tetrachloride is a chemical destroying the ozone layer, and its use should be decreased gradually.

四氯化碳是一种能破坏臭氧层的化学物质, 应该逐步减少其使用量.

All cases were cured after treated with chloramphenicolum or tetracycline tablets and supportive liver protection therapy.

所有患者经氯霉素或四环素类片剂及保肝治疗均痊愈.

Tetracycline sensitive is the worst sensitive ( 22.2 % ) .

四环素敏感性最差,其敏感率为 22.2%.

In human cells, tetracycline does not accumulate enough to hinder protein synthesis.

在人类细胞里, 四环素不能堆积到足够程度来阻碍蛋白质的合成.

The antibiotic tetracycline cause gray teeth in children whose teeth are still developing.

四环素能使仍处于发展阶段的儿童的牙齿变成灰色.

Objective : To evaluate the effect and safety of semiconductor laser bleaching on tetracycline-stained vital teeth.

目的: 评价半导体激光漂白四环素牙的临床效果和安全性.

Tetracycline is indicated in such cases.

这种病例四环素显示很有效.

He was treated with metronidazole for three weeks per os and tetracycline for four months.

其病程分期属于前淋巴瘤期的晚期.

Microspore abortion occurred after the tetrad formation.

小孢子败育发生在四分体形成以后.

The tapetum begins to vary at the stage of tetrad with the cytoplasm anther cell.

小孢子孢原为多细胞,小孢子母细胞减数分裂产生四面体型的小孢子四分体.

Super-microspore happened in the 5 % ~30 % or more tetrads and its formation was directly concerned with B-chromosome.

四分体中额外小孢子的形成与B - 染色体直接有关,其频率为5%～30%或更高.

The content of sulfoether in catalytic cracking diesel oil was determined by tetraethyl-lead potentiometric titration method.

应用四乙酸铅电位滴定法测定催化裂化柴油中硫醚硫的含量,电位稳定,终点电位突跃明显,结果可靠.

Historically, the primary source of lead emissions has been the result tetraethyl lead additives to gasoline.

从历史的角度讲, 铅挥发的最初来源是添加到汽油中的四乙基铅.

Chapter 3 introduces the variable time-step scheme in combination with solution-mesh refinement on unstructured tetrahedral mesh.

第三章介绍结合变时 步法 之非结构性可调适四面体网格.

An algorithm for generating three-dimensional tetrahedral mesh for simulation of brain deformation is presented.

本文提出了一种用于模拟脑组织变形的三维四面体网格划分算法.

The Rubik's is a toy in the shape of a tetrahedron.

魔方是个四面体的玩具.

Tetrahedron sandstone statues tower, the existing four, descending, were folded pyramid.

四面体砂岩造像塔, 现存4块, 由大到小,呈塔形叠起.

The internal structure of silica has a pyramid ( tetrahedron ) unit .

硅的内部结构是一个 四面体.

The catalysis of big pore strong acid resin for 1, 4-butanediol dehydration to tetrahydrofuran is investigated.

考察了大孔强酸性树脂对1, 4 丁二醇 脱水制四氢呋喃的催化作用.

Removal alcohol from crude tetrahydrofuran, formation principle of peroxidate and antioxidation technique were introduced.

介绍了粗品四氢呋喃的除醇技术, 过氧化物的生成机理与抗氧化技术.