In fact, the smoke-bomb was a pure invention to make the Bulgars think they could get away.

事实上，烟雾弹纯粹是为了让保加利亚人认为他们可以逃脱的发明。

The largest and most powerful of which are occasionally recorded for us by Western European scholars, who wrote about the dreadful Eastern heathens raiding their land, such as the Huns, Avars and Bulgars.

其中规模最大实力最强的部落被西欧学者偶然记录了下来，写的是诸如匈奴人、阿尔瓦人和保加利亚人这些可怕的东方外族突袭了他们的领土。