This has meant a disaster for health and social protection in the many countries where most labour is concentrated in the informal sector and the tax base is small.

在多数劳动力集中于非正式部门以及税基较小的许多国家，卫生和社会保护工作陷入困境。

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Currently, it is the largest concentrated continuous base in the country that is equipped with the cutting-edge Israeli water-saving irrigation technologies.

是国内目前最大的采用以色列先进节水灌溉技术的集中连片基地。

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Our attention was concentrated on metallic oxide solid base and composite solid base.

本文重点研究的是金属氧化物型固体碱和复合型固体碱。

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Since a substantial portion of subscriber losses was concentrated in the analog base, we expect a better future for the company as it approaches complete digital transition.

FORBES: Comcast Is Wired For $37 With Broadband Growth, Solid Earnings

Random House is taking a big chance by making such a big bet on an author whose fan base is concentrated in the under-30 demographic, a group not known for its willingness to pay for content of any kind.

FORBES: Can Lena Dunham Sell As Many Books As Tina Fey? Random House Bets $3.5 Million She Can

Irregularly shaped openings emanate from the base and are concentrated around the thin edge of the wedge-shaped building.

WSJ: Stays: Conrad Beijing