noun 下载 🔗分享 开口销，键。 A pin or wedge inserted through a slot to hold machine parts together. Examples : "The mechanic replaced the cotter on the bicycle wheel axle to keep the wheel from coming loose. " 那个机械师更换了自行车轮轴上的开口销，以防止轮子松动脱落。 machine technical part device 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 开口销，开口梢。 A cotter pin. Examples : "He used pliers to remove the cotter holding the wheel on the toy wagon. " 他用钳子拔掉了固定玩具车轮子的开口销。 machine technical part 与AI对话词汇游戏阅读练习
verb 下载 🔗分享 用开口销固定，用键固定 To fasten with a cotter. Examples : "The mechanic had to cotter the wheel hub to the axle to secure it properly. " 为了确保稳固，机械师不得不用开口销把轮毂固定在车轴上。 technical technology utility 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 佃农，茅舍农。 A peasant who performed labour in exchange for the right to live in a cottage. Examples : "The cotter worked the lord's fields from dawn till dusk, earning the right to live in a small cottage with his family. " 那个佃农从早到晚都在为地主耕田，以此换取和家人住在小茅舍里的权利。 person job history agriculture society 与AI对话词汇游戏阅读练习
