n.毛石；亂石；易切砂巖；離核果實(shí)
adj.離核的
Here he had the opportunity of learning at least the rudiments of freestone working. 在這兒,他至少有機(jī)會(huì)學(xué)一學(xué)用自由砂石作原料而工作的初步知識(shí)。
