underpin
/ˌʌndəˈpɪn; ˌʌndɚ`pɪn/ v
(-nn-) [Tn]
1 support (a wall, etc) from below with masonry, etc 用砖石结构等从下面支撑（墙等）; 加固（墙等）的基础.
2 (fig 比喻) form the basis for (an argument, a claim, etc); strengthen 为（论据、 主张等）打下基础; 加强; 巩固
The evidence underpinning his case was sound. 有利於他的证据是确凿的.
These developments are underpinned by solid progress in heavy industry. 重工业的稳固发展为这些进展打下了基础.