The boron deficiency plant appears inter-venial chlorosis, thickening, crisping leaves and increased leaf weight ratio (LWR).
缺硼使叶重比(LWR)提高和叶片脉间失绿、变厚、变脆。
| 单词 | boron 10 |
| 释义 |
boron 10
英语例句库
The boron deficiency plant appears inter-venial chlorosis, thickening, crisping leaves and increased leaf weight ratio (LWR). 缺硼使叶重比(LWR)提高和叶片脉间失绿、变厚、变脆。 Crystalline polypyrene microsheets were electrosynthesized in the medium of boron trifluoride diethyl etherate for the first time. 在三氟化硼乙醚介质,电聚合芘首次制备出结晶型的聚芘微米片。 Reaction of ferrocenylphenylcarbinol with ethereal solution of boron trifluoride in dichloride methane formed the relevant ferrocenylphenylmethyl carbocation. 二茂铁基苯基甲醇与三氟化硼-乙醚溶液在二氯甲烷中作用,形成二茂铁苯基甲基碳正离子。 By fuming with sulfuric-phosphoric acid mixture the residual hydrofluoride was then expelled，and boron was finally determined by curcumin spectrophotometry after distillation. 同时，对所拟溶样条件下所得硼的分析结果是否为全硼问题进行了进一步探讨，结果证实，所拟溶样条件下硼的测定结果为全硼。 An investigation is also made on determining DMDAAC qualitatively by bromophenol blue test and quantitatively by tetraphenyl boron sodium precipitation reac... 用溴酚蓝对DMDAAC进行定性分析，用四苯硼酸钠及折光率法进行定量分析的方法进行了探讨。 Only small amounts of wurtzite boron nitride and lonsdaleite exist naturally or have been made in the lab so until now no one had realised their superior strength. 天然存在或者实验室制造的纤锌矿型氮化硼和朗斯代尔石数量很少，直到现在，也没有一个人发现它们令人吃惊的硬度。
原声例句
经济学人-科技 The navy's notice suggests, though, that boron is back. 然而，海军的公告表明硼又回来了。 Reel知识卷轴 The only way you can get boron down there, is by the foundering of the ocean crust. 钻石的唯一来源就是海洋地壳的沉没。 经济学人-科技 So far, the researchers involved have managed to produce one that is 40% boron and yet burns more or less completely. 到目前为止，参与研究的研究人员已经成功制造出了一种含有40%硼且几乎可完全燃烧的燃料。 GQ — 明星们的代表角色 Super hardened boron, sharpened with a CO2 laser. - 超硬硼，使用 CO2 激光打磨。 VOA Special 2018年8月合集 Over millions of years, the boron continued to move deep underground. 数百万年来，硼继续向地下深处移动。 VOA Special 2018年8月合集 Scientists already knew these diamonds received their blue color from the element boron. 科学家们已经知道这些钻石的蓝色来自硼元素。 经济学人 Science and technology Its fuels are boron (five protons and six neutrons) and ordinary hydrogen, both plentiful. 它的燃料是硼（五个质子和六个中子）和普通的氢，两者都很丰富。 经济学人（汇总） America's air force experimented in the 1950s with stuff nicknamed zip fuel, which was laced with compounds of boron called boranes. 美国空军在20世纪50年代试验了一种叫做拉链燃料(高型能的飞机燃料)的东西，这种燃料含有硼烷的化合物。 Reel知识卷轴 The only way you can get boron down there, is by the foundering of the ocean crust. 24 They literally sink deep into the mantle. 在那里获得硼的唯一方法是通过沉没的洋壳。 24 它们真的沉入地幔深处。 经济学人（汇总） Compounds of boron feature in washing powders and cleaning products (" borax" ), antiseptics and water softeners, and also as additives in fibreglass, but such roles are humdrum. 硼化合物用在洗衣粉和清洁产品(“硼砂”)、防腐剂和水软化剂中，也可作为添加剂的玻璃纤维，但这些作用是单调的。 经济学人（汇总） The project's objective is to " determine a form of boron or a boron-based chemical pathway that leads to implementation of boron in energetic compounds, especially fuels (solid and liquid)" . 该项目的目标是“确定一种硼的形式或一种基于硼的化学途径，使硼在高能化合物，特别是燃料(固体和液体)中得以实现”。 科普小杂文 After that, for days, thousands of tons of clay, sand, boron, and dolomite, were dropped by helicopter into the burning reactor to quell the fire, but also to try and prevent the spread of radiation. 在那之后的几天里，成千上万吨的粘土，沙子，硼和白云石，被直升机抛进燃烧的反应堆中以扑灭大火，并试图阻止辐射的扩散。 |
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