no sooner...than...; the moment...; as soon as; once
No sooner said than done.
一说就做到了.
He started off as soon as he got the message.
他一接到通知就动身了.
The science of engineering began as soon as man learned to use tools.
人类一学会使用工具,工程科学就开始了.
The machine will start running as soon as the electric current is turned on.
电流一接通,机器就立刻开始运转.
No sooner were the pieces of charcoal rubbed against the glass rod than electricity appeared on the rod.
木炭块同玻璃一摩擦,棒上就带电.