Rack used this place as a supply drop,

"Rack used this place as a supply drop, " Prozor said, looking around at the rest of us besides Fura, which amounted to也就是 Strambli and myself. Just the bare minimum for an expedition into a bauble, with Surt and Tindouf staying behind on the main ship. Paladin counted as crew as well, I suppose, but none of us were in the habit of thinking of him in quite that way. "Propellant for his launch. A handsome stockpile. Rack's philosophy was to run a light ship-minimal armour, minimal armaments. And a nice, lean crew, so we didn't have to split a prize too many ways. He didn't want to be lugging a hold full of rocket fuel around, so the Monetta only ever carried just enough to do the job, Rack always knowing he could come back to the Rumbler when he needed a top-up." 

bare minimum 最低限度：指完成某项任务或满足某种需求所需的最低水平或最少数量。

Paladin counted as crew as well, I suppose, but none of us were in the habit of thinking of him in quite that way. 我想，Paladin也算船员，但我们都不习惯这么看他。

Propellant 推进剂，发射剂;（喷雾容器中提供压力的）压缩气体

armaments 武装；战备；军备

lugging a hold (full) (of rocket fuel) around

lug something around

hold（轮船或飞机的）货舱 - the space in a ship or aircraft in which goods are carried

If you top something up, you make it full again when part of it has been used.