伊卡莱姆的ScalersTalk第四轮新概念朗读持续力训练Day181L42-2 20190406
练习材料:L42-2:ModerncavemenThedeepestknowncaveintheworldistheGouffreBergernearGrenoble.Itextendstoadepthof3,723feet.Thisimmensechasmhasbeenformedbyanundergroundstreamwhichhastunneledacoursethroughaflawin