drop round meaning in English

串门

My sister dropped round last night .
昨晚，我姐姐顺便来我这儿串门儿。
Showers of blessing we need : mercy drops round us are falling , but for the showers we plead
主做我智慧使我可倚靠各时刻站在你受你照顾
I been in places hot as pitch , and mates dropping round with yellow jack , and the blessed land a - heaving like the sea with earthquakes - what do the doctor know of lands like that ? - and i lived on rum , i tell you
我曾在像沥青油那么烫的地方呆过，同伴们得了黄热病一个接一个地倒下去了，那鬼地方又发生了地震，地动得像海一样医生知道那种地方吗？
Mortars are high - angle weapons that are relatively short range and can safely be used to drop rounds close to friendly forces ( when in the defense , a mortar can hit targets as close as 70 - 100 meters away from the gun position with ease )
迫击炮是高射角武器，射程相对较短，可以为友军提供安全的近距离支援（在防御战中，一门迫击炮可以轻而易举地打击距离炮身70 ? 100米的目标）。