查询词典 isolated substance

This is called anaphylaxis and can happen within minutes to hours of exposure to the substance that the person is allergic to.

这就是所谓的过敏性反应和可能发生几分钟内，以小时暴露的实质该人是过敏。

Besides, the physiological significance of androecium or gynoecium abortion was discussed. In the evolution of long period of time, the aborted androecium or gynoecium "scrap" could be used by the same flower to offer energy and substance for flower development.

另外，探讨了雌蕊或雄蕊败育的生理意义，在长期的进化中，败育的雌蕊或雄蕊"废物"重新被利用，为同一花中迅速发育的雌蕊或雄蕊提供能量和物质的需求。

Part of the light ray is reflected back into the first substance, with the angle of reflection equaling the angle of incidence.

当光打在二透明物质间的介面时，光分成二部份

Aniline: One of the most important organic bases, parent substance for many dyes and drug s.

苯胺：一种重要的有机碱，是制造染料、药物的主要物质。

Aniline: One of the most important organic bases, parent substance for many dyes and drugs.

苯胺：一种重要的有机碱，是制造染料、药物的主要物质。

The technology of molecular-distillation for purifying star anise essential oil was researched, and chemical constitutions of essential oil and distilled substance were analyzed by GC-MS.

研究分子蒸馏技术纯化八角精油的工艺条件，利用GC-MS对精油及分离纯化的馏分进行化学组成分析。

Procedure— Using a dry syringe, quickly inject the Test Preparation, accurately measured and estimated to contain 0.5 to 5 mg of water, or as recommended by the instrument manufacturer into the anolyte, mix, and perform the coulometric titration to the electrometric endpoint. Read the water content of the Test Preparation directly from the instrument's display, and calculate the percentage that is present in the substance.

规程---使用一个干燥的注射器，快速注入测试样本，准确测量并估计大约含有0.5~5mg水，或者按照仪器制造商的推荐至阳极液中，混匀，采用库仑滴定法滴定至电量终点，直接从仪器显示处读取测试样本的水的含量，计算样品中存在的水的百分含量。

Besides, HIF-1 can quickly induce a lot of expressions and the adjustment of anoxia-induced genes, so as to enhance the hypoxia-induced genetic transcription and increase the expressions, and engender physiological effects, such as adjusting the transcription of EPO genes to increase their production, thereby the red blood cells quantity is enlarged, which strengthens the ability of oxygen transportation and mitigates anoxia; adjusting VEGF genetic transcription to engender more blood capillaries, consequently the transportation and supply of oxygen and substance of energy source are strengthened; adjusting the glycolytic enzyme to enhance glycolysis ability under anoxemia condition and increase energy supply; functioning on HO-1 genes in vascular smooth muscle cells to produce HO-1, which can engender NO and CO as pneumatic signal molecules to activate the guanylate cyclases, thus CGMP level is improved to make the vascular smooth muscles chalasia, to restrain platelet agglutination, so that theblood flow and vascular permeability are increased, and the anoxic tissues obtain ample oxygen supply, etc..

在低氧环境中，HIF-1可以被很快诱导大量表达并介导低氧诱导基因的调控，使低氧诱导基因转录增强，表达产物增多，产生生理效应。

Saccharin, which has been around since 1879, is made from methyl anthranilate, a substance in grapes.

另外一种糖精在1879年就出现了。它是由葡萄中的一种含甲基的物质构成的。

Scientists have found in also contain a cancer, anti-ageing substance -- glutathione.

科学家发现，番茄中还含有一种抗癌、抗衰老的物质——谷胱甘肽。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？