chocker,ducker是什么意思

ducker ['d?k?]
n. 潛水者；養(yǎng)鴨者；潛水鳥
Ducks clucked under the docks with a ducker in duck ducking into the dark.
鴨子在碼頭下面咯咯直叫chocker，一個穿帆布服的獵鴨人一閃隱入黑暗中。