We take providing excellent communication products and first-rank after sales service with our customers as our tenet.

我们不仅提供优质的通信产品，还提供一流的售后服务。

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This thesis discusses the first-rank control theory which is applied widely, and we discuss the principle and algorithm of linear-quadratic regulator in details.

本设计针对广泛应用的最优控制理论进行论述，并对其在实践中常用的线性二次型问题的原理和算法详细阐述。

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Through hard work, he eventually managed to become a student of the first rank.

通过努力，最终他成功成为了最优秀的学生。

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There is a paradox surrounding Wales's position in the first-rank of internet movers and shakers, which he freely acknowledges.

BBC: NEWS | Technology | Wikipedia founder takes on Google

The markets apparently regard me as a worse credit risk than the government of the world's eighth largest economy - largely because individuals have a sorrier history in general of repaying what they owe than the public sectors of first-rank developed economies.

BBC: Who would you lend to �C Italy or Peston?

The appointment of Egemen Bagis, a sharp young English-speaker, as Turkey's first cabinet-rank EU negotiator suggests that Mr Erdogan may make a fresh effort to put the EU talks back on track.

ECONOMIST: Turkey