be on firm ground

基本解释

The entire cable-car system recently got an overhaul after more than a century of operations so you are on firm ground even if the streets seem to be tilting beneath you.
在运行了一个世纪之后，最近对整个缆车系统进行了彻底检修。所以即使你觉得街道似乎在下面倾斜，你在缆车上仍很安全。
The salaries of the team members on the ground during project execution needs to be paid by the consulting firm until payments start flowing and there is a constant revenue flow.
在项目执行期间，团队成员的工资需由咨询公司支付，直到支付款开始流动，并有稳定的收益流为止。
On the ground that it was Maison Bouygues's largest shareholder, Bouygues SA claimed to be the firm's controlling shareholder.
布伊格股份有限公司由于是Maison Bouygues's公司最大的股东，所以也就主张是公司的控股股东。

You always want to be standing on firm ground.
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But the company believed it was standing on firm factual ground and refused to be bullied.
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