The principle and method for testing surface crack through direct current potential difference are introduced.

首先介绍了直流电位法——裂纹扩展片检测裂纹的方法和原理。

youdao

Trade fairs offer direct contact with current and potential customers and a venue to launch products that will reach opinion-formers (such as journalists).

展销会提供了与现有及潜在客户的直接接触，上市会则可以让媒体了解（例如记者）。

youdao

Through electrostatics and examples of low-frequency alternating current and direct-current circuit, the problem of zero potential point is queried and clarified.

通过静电学、低频交流、直流等电路实例，质疑了电势零点问题，并对此进行了澄清。

youdao

The cost-lowering potential of direct-payment practices is heartening because the current third-party payment system has failed to stem our burgeoning health cost crisis.

FORBES: Fed Up With Obamacare, Doctors Increasingly Prefer Cash For Care