1. 程序代码就变得越来越了。
The code became gangly.

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2. 在阳离子表面活性剂——十六烷基三甲基溴化铵(CTMAB)的存在下,用比法对铝箔蚀液中微量硫酸根离子进行测定。
Traces of sulfate ions in etching solution for aluminum foil have been determined by turbidimetry in presence of cation surface activator-hexadecyl trimethyl ammonium bromide (CTMAB).

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3. 酸已经了金属的表面。
This acid has eaten into the surface of the metal.

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4. 酸已经了金属的表面。
This acid has eaten into the surface of the metal.

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