direct observation
英
美
- 直接调查
双语例句
- Use methods that permit direct investigation of the question.
使用直接调查研究问题的研究方法。 - These direct investigations aim at addressing problems at a higher level by adopting a proactive and preventive approach.
进行直接调查的目的，在于以积极主动的态度，从较高层次着手解决问题。 - Most information was collected by direct observation of the animals' behaviour.
大部份信息都是通过直接观察动物的行为收集到的。 - Ophthalmoscopy affords the only opportunity for direct visualization of blood vessels.
检眼镜检查法提供直接观察血管的唯一机会。
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