Agriculture forms the backbone of the rural economy.

农业是农村经济的基础。

《牛津词典》

This is particularly true of the Mittelstand, the small and not-so-small companies that are the backbone of the German economy.

这在德国的中小型企业上体现的尤为明显。这些规模不太大的公司正是德国经济的脊柱。

youdao

During British rule the region formed the backbone of the colonial economy and served as a cradle of Zambian nationalism.

英国统治时期，该地区是这块殖民地的经济支柱，并成为赞比亚民族独立运动的发源地。

youdao

And for South Korea, where exports are the backbone of the economy, being well regarded abroad is all the more important.

VOA: standard.2009.11.05

Transdniestria's smugglers and arms salesmen the backbone of the economy, along with a big Ukrainian-owned steelworks trade through Ukraine, especially via Odessa.

ECONOMIST: Troubled Moldova

By 1936, industrial production surpassed its 1929 peak, an indication that the backbone of the economy trumped the stock market.

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For one thing, the companies that make up the backbone of the economy, the small and middle-sized ones, most of them in central and northern Italy, are remarkably buoyant.

ECONOMIST: A survey of Italy