This dissertation mainly studied three kinds of instruction patterns through two years observation and analysis: on-the-spot guidance, outside the field instruction and network instruction.

经过两年来对该中心早教指导实践的跟踪观察与分析，本研究主要深入探索了三种早教指导形式：现场指导、场外指导和网络指导。

youdao

Through two years of social life, I grew a lot.

通过两年的社会生活，我成长了很多。

youdao

State economists say Alaska had twenty-one years of economic growth through two thousand eight.

VOA: special.2009.03.02

The seeds take two years to sprout up through the ground.

VOA: special.2009.04.07

Fung has been playing with Dharma Swara for two years, and was first introduced to gamelan music through a world arts fellowship six years ago.

VOA: standard.2010.07.01

Otherwise, why would airlines have stuck with the Dreamliner through two years of mishaps?

FORBES: Is It Too Late To Bet On Boeing's Dreamliner?

Almost three years later Xilinx has lost its sheen after suffering through two years of minuscule growth.

FORBES: Chip wars

Pearltrees, through two years in the desk bound web browser, have all the techies and niche players they need.

FORBES: Pearltrees Harness The iPad To Grow Their Company