noun🔗Share棘爪，制动爪. A pivoted catch designed to fall into a notch on a ratchet wheel so as to allow movement in only one direction (e.g. on a windlass or in a clock mechanism), or alternatively to move the wheel in one direction."The bicycle's freewheel uses a pawl that clicks as you coast, preventing the pedals from turning backward when you stop pedaling. "自行车飞轮里有个棘爪(jízhuǎ)，当你滑行的时候会发出咔哒咔哒的声音，它能防止你停止踩踏板时，脚踏板向后转动。machinetechnicaldevicepartfunctionChat with AIVocabulary GamePractice Reading
noun🔗Share棘爪, 止动爪 A similar device to prevent motion in other mechanisms besides ratchets."The emergency brake in the old car used a pawl to keep the wheels from rolling backward down the hill. "那辆旧车的紧急刹车使用一个止动爪，防止轮子在下坡时向后滚动。devicemachineparttechnicalChat with AIVocabulary GamePractice Reading
verb🔗Share止爪卡住，用棘爪止住 To stop with a pawl."He carefully pawled the winch, preventing the rope from slipping further down. "他小心地用棘爪卡住了绞盘，防止绳子进一步滑落。machinetechnicaldevicepartactionChat with AIVocabulary GamePractice Reading
