In the late 1700s and the earlier 1800s, the development of the piano coincided with the growth of the middle class in Western Europe.

在18世纪晚期和19世纪早期，钢琴的发展恰好与西欧中产阶级的壮大是同步的。

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This class of environment includes the Development environment.

这一类型的环境包括开发环境。

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The majority of the class-development work for a mathematical class involves computing intermediate and summary values.

数学类的大部分类开发工作都涉及到计算中间值和汇总值。

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Mr Thong said the aircraft were needed to help boost the airline's growth, particularly in the development of business class services with Europe.

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The basis of this platform will be efficient talent scouting and development process culminating in the development of an elite world class professional domestic league which will showcase the best available Indian and international talent.

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In the past decade, Afghanistan has seen the development of a younger professional class, much thanks to the opportunities of higher education offered by newly opened affordable private universities.

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