Results: the positive rate of gas-barium double contrast kinesis radiography with the observation through slow playback to discover nonage upper esophageal carcinoma is the highest.

结果：使用气钡双重对比剂动态造影法摄像后再慢动作回放观察的方法发现早期上段食道癌的阳性率最高。

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DESIGN: Randomized and double blind observation.

设计：随机双盲法观察。

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The observation window on the door is made of double-layer tempered glass, the material heated in the oven can be observed clearly, meanwhile, the thermal insulation is well.

箱门观察窗为双层钢化玻璃结构，能清晰观察箱内加热的物品，又有良好的隔热效果。

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India's low productivity is the central preoccupation of McKinsey's analysis, which starts with the unexceptionable observation that India needs nearly to double its economic growth rate to 10% if it is to employ the masses due to enter the workforce over the next decade.

ECONOMIST: Why India's economy needs faster privatisation