n (1)龍頭，旋塞(tap or valve for regulating the flow of a liquid or gas in a pipe)[C]：turn on/off the～打開/關(guān)上龍頭;〖同〗tap;
(2)(槍)扳機(hammer of a gun)[C];
v (1)扣扳機(draw back(the hammer of a gun)ready for firing)[T+n]：The soldiers～ed their rifles. 士兵們扣動步槍的扳機?！挤础絬ncock;
(2)豎起(cause sth to be upright or lift)[T+n，T+n+prep，T+n+adv(up)，I+adv(up)]：The dog～ed its ears/hind leg.狗豎起耳朵/抬起后腿。The horse's/dog's ears～ed up.(The horse/dog～ed its ears up.)馬/狗的耳朵豎了起來。(馬/狗豎起了耳朵。)〖同〗raise;
(3)使傾(歪)斜(cause sth to tilt up or to one side)[T+n，T+n+prep]：～one's hat/one's head歪戴著帽子/歪著頭;The bird～ed its head to/on one side.那鳥把頭偏向一邊。