为什么我们为专业人员提供的签证如此之少,以致于在每年的刚开始签发的几天内就签发光了?
Why do we / offer so few visas for specialists that / the supply runs out / within days of becoming available each year?
offer so few visas for XXX that ...
为XXX提供的签证如此之少以致于...
the supply runs out
供应用光
days of becoming available
变成可用（这里指开始签发签证）的几天
so...that...
如此...以致于...