noun 下载 🔗分享 内胎,里胎。 In a pneumatic tire, the rubber liner that holds the air. Examples : "The bicycle tire was flat because the innertube had a hole in it. " 自行车胎没气了,是因为里面的内胎破了个洞。 material vehicle part technology 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 内胎,浮圈。 This rubber liner, used without the tire on water as a flotation aid. Examples : "We used an innertube to float down the lazy river at the water park. " 我们用水上乐园的内胎/浮圈在漂流河上漂流。 material aid sport nautical 与AI对话词汇游戏阅读练习