考研化学复试英语翻译部分主要考察的是专业英语的阅读理解和翻译能力，以及英语口语的表达能力。以下是相关准备和示例：
专业英语翻译
复试中专业英语翻译通常涉及与所学专业相关的文献或段落翻译。因此，积累相关领域的专业词汇非常重要。
例如，可以翻译一些化学领域的经典文献或实验描述。以下是一个简单的化学文献翻译示例：
> When a fluid flows through a duct or over a surface, the velocity over a place at right angles to the stream is not normally uniform. The variation of velocity can be shown by the use of streamlines which are lines so drawn that the velocity vector is always tangential to them. The flow rate between any two streamlines is always the same. Constant velocity over a cross-section is shown by equidistant streamlines and increase in velocity by closer spacing of streamlines.
英语口语
英语口语部分主要考察日常交流能力和专业问题的回答能力。可以准备一些常见的面试问题和自我介绍。以下是一个英语自我介绍的示例：
> Good afternoon, professors. I am glad to take this interview. First of all, I would like to introduce myself. My name is Huang Fengqin. Currently, I am a senior student at Peking University. I have a strong interest in chemistry and have been engaged in various research projects in this field. I am eager to further my studies and contribute to the scientific community through my research and future studies. Thank you for having me.
综合准备
除了上述的文献翻译和口语练习，还可以通过阅读专业英语文献、听英语学术讲座等方式提高自己的专业英语水平。
同时，注意提高自己的语言表达能力，确保在面试中能够清晰、准确地表达自己的观点和想法。
希望以上信息对你有所帮助。