For example, when several Australian aborigines want to plan an event for a future time, one of them places a stone on a cliff or in a tree.是什么意思_For example, when several Australian aborigines want to plan an event for a future time, one of them places a stone on a cliff or in a tree.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句