求翻译：当单词 "pine" 和 "cone" 一同使用时, 则将包含 "evergreen tree" 的两个词 义选择为最合适的词义. 原来的 Lesk 算法不会利用 语境, 这个贪心算法不会一直有效.是什么意思？

When the word "pine" and "cone" when used together, it will contain "evergreen tree" two selected as most appropriate for the meaning of meaning. Lesk algorithm will not use the context of the original, the greedy algorithm will not always effective.