youdao

Our laboratory has made more than three years of study in this aspect and already designed two sets of systems.

本实验室对此已经进行了三年多的研究，曾先后设计出两套系统。

youdao

In nineteen eighty-three, he began to study more than twenty-two thousand healthy male doctors over forty years of age.

VOA: special.2009.10.20

Graduates of study programs at most foreign medical schools may have to complete two or three years of residency, although there are exceptions.

VOA: special.2009.06.02

And,all of the students were required to study for four years instead of three.

VOA: special.2010.06.27

After three years of study, the government has come up with some recommendations.

CNN: SINGAPORE

On winning the Tchaikovsky competition in 1990, Boris Berezovsky left Russia after only three years of study at the conservatory.

ECONOMIST: Classical music in Moscow

They must hold a state license and a doctor of pharmacy degree from an accredited program, earned after two or three years of postsecondary study.

FORBES: 1. Pharmacist