noun 下载 🔗分享 毫米,公釐 An SI/MKS unit of measure, the length of 1/1000 of a metre. Symbol: mm Examples : "The raindrops were tiny, only a few millimetres in diameter. " 这些雨点很小,直径只有几毫米。 unit math science 与AI对话词汇游戏阅读练习