我是透性膜。
设计一种适合的膜非常困难：一方面要足够坚韧，以承受压力；但同时还要有渗透性，而且只能透水，不能透盐。
Devising a suitable membrane-tough enough to withstand the pressure while remaining permeable to water but not to salt-is harder than it sounds.
这项实验在上周的一期《自然》杂志上做了报道。这项实验利用的是一种被称作电磁诱导增透性的特殊性质。
The experiment, reported in last week's issue of the journal Nature, took advantage of a peculiar property called electromagnetically induced transparency.
天然牙的视觉外观除了颜色的三要素色相、明度、饱和度以外，还有许多第二光学特征：半透性、浑浊度、晕色、表面光泽度、荧光性，其中以半透性最为重要。
In addition to value, hue and chroma, there are many subtle secondary optical properties of natural human tooth, such as translucency, opacity, iridescence, surface gloss and fluorescence.
淬透性与等温回火温度无关。
The hardenability is irrelevant to the isothermal tempering temperature.
品种抗病性与细胞膜透性变化呈负相关。
There was a negative correlation between the disease resistance of cultivars and the permeability of cell membrane.
葡萄叶细胞膜透性随处理盐浓度的增加而增加。
Cell membrane permeability of grape leaves was increased following the increase of NaCl concentration.
它是差异透性的，故可控制分子和离子的进出。
It is differentially permeable, hence it can control the entrance and exit of molecules and ions.
目的研究制作工艺对牙科陶瓷半透性和颜色的影响。
Objective To study the influence of manufacture technique on the translucency and color of dental porcelain.
结果表明：枣果衰老软化时，膜透性增大，丙二醛含量上升；
The results showed that the membrane permeability and malonialdehyde content tended to increase as jujube fruit became senescent and softening.
无机矿物质与改性高分子聚合物共混，能够提高肥料包膜的透性。
The inorganic mineral combined with modified high molecular polymer can increase the permeability of coated fertilizer.
钢淬透性的定量计算在结构件钢种的设计与制造中具有重要意义。
Quantitative calculation of steel quenching degree has very important significance for design and manufacture of steel species applied to structure.
不同树种的桉树，随温度的下降，其细胞膜透性的变化有显著差异。
The membrane permeability change of different species Eucalyptus had significant differences with temperature reducing.
高瓦斯低透性煤层的瓦斯抽放，一直是煤矿安全生产过程中的重大技术难题。
Gas drainage in high gassy coal seam with low gas permeability is always an hard solved significant technology problem in the process of safety production.
采用高淬透性钢进行空冷淬火是一种减少铸件热处理变形和开裂的有效措施。
It's a feasible practice to quench in air for castings made of steels with higher hardenability to reduce or avoid its deformation and crack during heat treatment process.
因此，可以认为叶片脯氨酸含量和质膜透性可作为甘蔗抗旱性育种的选择指标。
It is concluded that plasm membrane permeability of cell and leaf proline content can be used as indices for drought resistance selection in sugarcane breeding.
介绍了硼元素的特点及其在钢中的作用，微量硼可以明显改善钢的淬透性和韧性。
The characteristics of boron element and its effect in cast steel are introduced. Microamount boron can improve the hardenability and toughness of carbon steel.
作为光透性胶粘剂，必须均匀，对光具有低的吸收，和被粘接材料的折射率相当。
The transparent adhesive must be homogeneous and low in absorption of light, and its refrangibility must be same as that of the material to be bonded.
反之，也可根据对某一直径钢球的淬硬层深度的要求，选择具有适当淬透性的钢种。
Conversely, according to the demand of hardening depth of a certain diameter of steel sphere, a steel kind of suitable hardenability can be selected.
研究了高温胁迫条件下香根草相对含水量、膜透性、脯氨酸和叶绿素含量的变化规律。
The variation patterns of relative water content, membrane permeability, proline content and chlorophyll content in vetiver grass under high temperature stress were studied.
镉胁迫使小麦幼苗膜脂过氧化水平提高，细胞膜透性增大，SOD、POD活性增强。
Treated wheat seedling with cadmium, it increased the level of membrane lipid peroxidation, cell membrane permeability, activity of SOD and POD.
热处理：钢及有色金属的常规热处理与化学热处理，钢的淬透性测试，钢的表面处理等。
Heat processing: normal heat treating and chemical heat treating of steel and nonferrous metal; testing the hardenability of steel; surface treatment of steel.
但是这类合金在使用中也产生了不少材料科学方面的问题，如相变点、淬透性、疲劳寿命等。
However, in the use of these alloys, there are some problems of material science which should be solved, such as phase change temperature, hardenability and fatigue life.
从生物量、作用方式、细胞膜透性及蛋白质含量方面来研究鹿蹄草素对链格孢病菌的抑菌机理。
Study on inhibitory mechanism of pyrolin against Alternaria alternate from Alternaria alternate growth, action mode, cellular membrane permeability and protein content.
本文介绍了60D低淬透性钢万向节十字轴和循环球转向螺杆的各项性能及装车使用试验情况。
This paper presents the properties of the U-joint spiders and the worms of recirculating ball steering gear which made from a low quenchability steel 60D, as well as their testing results on the road.
红外线透性薄膜有黑色薄膜那种控制杂草的特性，在增加土壤温度方面介于黑色与透明薄膜之间。
The infrared-transmitting (IRT) mulches provide the weed control properties of black mulch and are intermediate between black and clear mulches in terms of increasing soil temperature.
果实发育过程中SOD活性与MDA含量、细胞膜透性呈负相关，SOD活性高的果实不易裂果。
SOD activity was negatively correlated to MDA content and cell membrane penetrability. Fruits with high SOD activity seldom crack.
结果表明：本研究提出的用于模拟结果分析的锻透性判据合理，工艺过程和参数的确定方法正确。
Reasonable process parameters were determined, and the forging penetration efficiency was explored from the strain-effective state.
结果表明：本研究提出的用于模拟结果分析的锻透性判据合理，工艺过程和参数的确定方法正确。
Reasonable process parameters were determined, and the forging penetration efficiency was explored from the strain-effective state.
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