noun 下载 🔗分享 车辕, 辕, (also) 辕木. One of the two long pieces of wood, extending before a vehicle, between which a horse is hitched; a shaft. Examples : "The farmer carefully attached the horse to the wagon's thills. " 农夫小心地把马套在了马车的辕木上。 vehicle part machine agriculture 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 煤层底板，煤层底部的浅层黏土。 The shallow stratum of underclay that lies under a seam of coal; the bottom of a coal-seam. Examples : "The miners carefully removed the coal, being mindful of the slippery thill underneath to avoid a cave-in. " 矿工们小心翼翼地移走煤块，注意着下面湿滑的煤层底板，以避免塌方。 geology material 与AI对话词汇游戏阅读练习
