Agriculture is still the mainstay of the country’s economy.

农业仍然是这个国家经济的主要支。

Agriculture used to be the economic backbone of this country.

农业曾是这个国家的经济支。

I am not sure if these props will stay in long enough to do the work.

这些支能否维持到工作结束, 我对此没有把握。

The struts are firmly braced.

那些支很牢靠。

The relationship between the wet flashover voltage and the precipitation or the water conductivity was congruous with the power function relation.

淋雨量、雨水导率小对支绝缘子的污雨闪响也较，且均符合幂函数关系。

Pillar glass vase in different height and diameter. Clear cylindrical design is great for spotlighting river stones or colorful marbles piled in the bottom.

支玻璃花瓶，在不同的高度和直径。明确圆设计，是非常突出河石块或彩色理石砌成，在底部。