wild - living in nature and not under human control or care., timberline - polar region beyond which trees will not grow., winter - the coldest time of year, when it gets really chilly outside, sometimes with snow falling, and the days are short with long nights., spring - the season of the year between winter and summer. When the weather gets warmer, flowers start to bloom, and animals wake up from their winter sleep., survive - to keep on living., ecosystem - all living things that live in one area.,

ELD II Vocabulary

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恢復自動保存: ?