有底 [
yǒu dǐ]
know how things stand and feel confident of handling them
be fully prepared for what is coming
- 他心里有底, 一点不慌。
- 钱包满满(重重的),心情就轻松。有钱心里才有底。
A heavy purse makes a light heart. - 垂直平行密集束状孔落矿有底柱崩落法是一种新的采矿方法。
In the vertical-Parallel concentrated bunch-holes caving, the floor pillar caving is a new mining method.