A ratchet mechanism transfers the thread from spool to bobbin.一种棘齿装置把线从线轴转到梭心上。On dictation equipment, a spool on which magnetic tape is wound.在口述记录设备上, 一种卷绕磁带的轴.a spool of cotton一轴棉线a spool of thread一轴线...
把贻贝洗干净，凡是合不上口的都扔掉。Clean the mussels and discard any that do not close.渔民们害怕宝贵的牡蛎和贻贝层会被破坏。Fishermen fear valuable oyster and mussel beds could be decimated.用一把硬刷子在冷自来水下冲洗贻贝。Clean the mussels with a stiff brush under cold ...