数字化牙片可迅速、准确地了解根管预备、根管长度及根管充填情况，优于传统牙片。

Digital periapical film can quick understand the root canal preparation, root canal length and root canal filling accurately, surpassing conventional periapical film.

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为了更好地做好高职毕业生的就业工作，我们必须准确了解市场对高职毕业生的需求情况。

Therefore, we have an exact investigation for the Chongqing talents market so as to make clear the demand for the higher vocational college graduates, improve our understanding and work ability.

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在钻井过程中，准确地发现油气层、及时了解储层的物性情况，对油气勘探、开发工作至关重要。

It has crucial importance in oil and gas exploration to find hydrocarbon zone and to take knowledge of the reservoir physical property in time in drilling process.

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