Lack of preparation can cause test anxiety or make it worse, but for many people test anxiety occurs regardless of preparation or knowledge of the material.

有时，对考试准备不足会导致考试焦虑或者加剧考试焦虑，但对很多人而言，不论准备做得怎样，知识掌握得如何，都会有考试焦虑。

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The test shows that these methods can distinguish the object and background perfectly to make preparation for the following recognition.

实验表明，这些方法能较好地区分目标和背景，为目标识别作好准备。

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The test shows that these methods can distinguish the object and background perfectly to make preparation for the following recognition.

实验表明，这些方法能较好地区分目标和背景，为目标识别作好准备。

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