2ADV-BRD-NEG [ADVERB before verb]刚刚…(就) If you say that one thing had barely happened when something else happened, you mean that the first event was followed immediately by the second. 刚刚…(就)
The Boeing 767 had barely taxied to a halt before its doors were flung open.
这架波音767刚刚停住,它的舱门就弹开了。
Barely had the bulldozers started when Museum of London archaeologists swooped.