N-SING
许可;批准
If you give someone or something the go-ahead, you give them permission to start doing something.
例句
The Greek government today gave the go-ahead for five major road schemes...
希腊政府今天批准了5项重大的道路修建方案。
Don't do any major repair work until you get the go-ahead from your insurers.
除非经保险公司同意,否则不要进行任何大修。