However, before you can perform an analysis, you need to extract and pre-process this data.
然而，在您执行分析以前，您需要提取并预处理这些数据。
If you have a pre-existing medical condition, consult a doctor before use.
如果你有一个预先存在的医疗状况，请教医生后使用。
Pre-advertising is before the Spring Festival Gala.
事先广告是在春晚开始前播放的广告。
Before starting the production there will be a so-called pre-manufacturing meeting.
在开始生产前，必须召开一“制造前会议”。
The new factory should be pre-qualified for FCCA before order commitment.
新工厂应在接受订单前进行FCCA的预评估。
Therefore, it's a good idea to get pre-approved before you start the house-hunting process.
因此，这是一个好主意预先核准，然后再开始的房子狩猎的过程。
Is a formal pre-production meeting held before the start of production for all new styles?
在一个新产品生产前会召天预产会议吗？
The column must be pre-equilibrated in binding buffer before beginning sample application.
列必须在开端抽样应用之前在捆绑的缓冲器中被平衡。
Pre-Workout: Take 4 Rapid Release Caplets immediately before exercise.
预锻炼：在运动前立即服用4粒。
Pre-Workout: Take 4 Rapid Release Caplets immediately before exercise.
预锻炼：在运动前立即服用4粒。
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