单词：gobbing
音标：['ɡɒbɪŋ] ；
v. 吐唾沫( gob的现在分词 ); 充填
n. The refuse thrown back into the excavation after removing
the coal. It is called also gob stuff.
n. The process of packing with waste rock; stowing.
the coal. It is called also gob stuff.
n. The process of packing with waste rock; stowing.
词型变化：名词复数形式 : gobbings