A method of extracting and purification natural red pigment from ear of torch tree is proposed.
研究了从火炬树果穗中提取红色素的方法，并对其进行精制。
The left side was shot at f/22: The torch is in focus, and you can make out the tree and the house behind it. That's a large DOF.
仔细观察一下这张有一盏落地式火炬灯的照片，左侧是在f/22的光圈拍摄的：火炬灯为焦点，你可以看出背景中的树木和房屋，这就是我们说的大景深。
The left side was shot at f/22: The torch is in focus, and you can make out the tree and the house behind it. That's a large DOF.
仔细观察一下这张有一盏落地式火炬灯的照片，左侧是在f/22的光圈拍摄的：火炬灯为焦点，你可以看出背景中的树木和房屋，这就是我们说的大景深。
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