mainstay industry

基本解释

Building trade's one of the mainstay industry in the national economy. Its position becomes more and more important.
建筑行业是国民经济支柱产业之一，它在国民经济和社会发展中的地位和作用越来越重要。
Textile and garment industry is one of important mainstay industry in China's economy and textile and garment trade has an very significant status in China's foreign trade.
纺织品服装工业是中国国民经济重要支柱产业之一，纺织品服装贸易在中国对外贸易中也占有极其重要的地位。
As the important mainstay industry of national economy in China, real estate economy early warning system has important economical significance and social significance for real estate industry.
作为我国国民经济重要支柱产业的房地产业，房地产经济预警具有重要的经济意义和社会意义。

Indeed, Mr Deighton believes that the television commercial will remain the mainstay of the advertising industry for years to come.
ECONOMIST: The recession in advertising
That is because natural-gas exports, long the mainstay of the energy industry, are threatened by shale gas in the United States (they have fallen by 5% over the past year).
ECONOMIST: Energy in Canada
These treatments became a mainstay of the nascent biotechnology industry, which started with the founding of Genentech in 1976.
FORBES: How The Odd Couple's Jack Klugman Helped Create The Biotech Industry

支柱产业
Textile industry is the mainstay industry of national economy.
纺织产业是国民经济的支柱产业。