n.(防倒转的)棘齿
vt.安装棘轮于;松脱,把…造成棘齿形,于…作棘齿,在…上刻锯齿
He fears inflation will ratchet up as the year ends.
他害怕通货膨胀会在年终更加严重。
The chair has a ratchet below it to adjust the height.
这把椅子下面有棘轮调整高度。
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。