《You must be careful of falling stones》Rules and suggestions PPT课件3
《You must be careful of falling stones》Rules and suggestions PPT课件3第3页

 go in one go rock rock climbing stone fairly smooth straight

n. 尝试;努力 一口气;一下子 n. 岩;岩石 攀岩 n. 石头 adv. 相当;还算 adj. 无困难的; 顺利的; 光滑的; 平坦的 adj. 直的;笔直的