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

以BTEAC(苄铵)为相转移催剂合成了烟酸酯。

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

由苯与丁酰在无水铝作催剂的条件下制备苯酮。

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冷知识百科大全

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

ISO 标免费的, 而且价格也宜。

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TED演讲(视频版) 2023年8月合

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

次上​​网,在 YouTube 上自学 ISO 和光圈。

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3G, 401(K), a,
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