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Synthesis of ethyl iso nicotinate using BTEAC (benzyl triethyl ammonium chloride) as phase transfer catalyst was studied.

以BTEAC(苄基三乙基氯铵)为相转剂合成了烟酸乙酯。

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Methyl 1 phenyl Propanone was synthesized with benzene and iso butyryl chloride by using anhydrous aluminium trichloride as catalyst.

丁酰氯在无水三氯铝作剂的条件下制备基丙基酮。

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冷知识百科大全

ISO standards are not free, and they're not even cheap.

ISO 是免费的， 而且价格也宜。

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TED演讲（视频版） 2023年8月合集

And once again, I go online, and I teach myself about ISO and aperture on YouTube.

上​​网，在 YouTube 上自学 ISO 和光圈。

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