Read on to learn how to choose the best tree for you, put it up straight without a struggle, and keep it fresh, fragrant, and hazard-free —plus, secrets to holiday cleanup and ornament storage.
读下去，你会学到如何挑选最好的圣诞树，还有如何放置它：直立起来，不能有半点倾斜；让树保持旺盛的生命力，能始终散发出松树特有的芳香；要让它远离任何可能的伤害——除此之外，本文还会告诉你一些假期之后如何清扫和布置装饰品的小窍门。
The URL indexing algorithm based on tree searching, achieving both a fast searching speed and a significantly low storage requirement.
URL检索融合了树查找算法，在实现了快速检索的同时减少了存储空间需求。
In order to decrease the storage cost of group key distribution protocol, a secure group key distribute protocol based on the status key tree is proposed.
为了减少群组密钥分发协议的存储代价，提出了一种基于状态密钥树的群组密钥分发协议。
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