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例句 1. Removing dead trees is not good for a forest because it deprives it of the nutrients which dead trees release into the soil and these nutrients are necessary for the growth of the trees that will be planted in the future. 将死去的树木移走对森林而言并无好处，因为这会使森林失去死掉的树木释放到土壤中的营养，而这些营养对于日后种植的树木来说是必需的。
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2. Plant stems die soon when deprived of water. 植物的茎缺水之后很快就会死亡。
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deserted［di’zə
:rtid］a. 荒废的；荒芜的；被离弃的
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例句 1. Imagine that you’re on a deserted way late at night and your car breaks down, what will you do? 想象深夜时分，你的车在一条荒芜的道路上抛锚了，你会怎么做？
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2. The downtown areas were deserted after the war. 市中心地区在战后就被废弃了。
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同义 obsolete（a. 荒废的）
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要点 尽管deserted和obsolete都有“荒芜的”的含义，但两者略有不同：deserted强调“被遗弃”，而obsolete则更强调“废弃”这层含义，如：obsolete technique（废之不用的技术）。
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destructive［di’strʌktiv］a. 破坏性的，毁灭性的
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搭配 destructive power 破坏力
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例句 1. Salvage logging may be effective to help forests recover after a destructive fire or storm, but it will lead to serious longer-term environmental damage. 抢救性砍伐也许能有效地使被毁灭性的大火或风暴破坏的森林恢复到原来的状态，但这种方法将导致严重的长期的环境破坏。
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2. The destructive power of fungi is impressive. 真菌的破坏力惊人。
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同义 ruinous（a. 破坏性的）
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detect［di’tekt］v. 发现；探测；查明
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例句 1. There are specialists who constantly monitor the contents of the online encyclopedia, so that they can remove the doubtful information once they detect it. 有专家时刻监控在线百科全书的内容，这样一旦发现可疑的信息就能立刻将其删除。
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2. For the sake of the free medical services, many illnesses could be detected at an earlier stage. 由于免费的医疗服务，许多疾病可以在早期就被发现。
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3. These experiments were designed for detecting consciousness. 这些实验被设计用来探测意识。
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要点 除了detect以外，discover和explore也有“探测，探索”的含义，但区别是discover侧重表示“发现事物的客观存在”，而explore则有“探索，考察”的含义；detect主要表示“探测”，也有“察觉”的意思。
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dilemma［di’lemə］n. 困境，进退两难的局面
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例句 1. Young couples will face a dilemma when they have a child—who should stay at home and who should continue to work? 当年轻夫妇有了孩子的时候，他们将面临一个两难的局面——谁应该在家照顾孩子，谁又应该出去继续工作？
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2. In modern society, employers always face the dilemma—to work with a group of people or work independently. 在现代社会，员工总是面临一个两难的局面——是和一个团队的成员一起工作还是独立工作。
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3. When I was on a tight budget, I had the dilemma of choosing a new phone or a computer. 当我的预算很紧张时，我面临着选择新手机或新电脑的两难局面。
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disastrous［di’zæstrəs］a. 灾难性的，造成灾害的；损失惨重的
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例句 In the disastrous war, a great number of people lost their homes and families. 在这场灾难性的战争中，很多人失去了家园和亲人。
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dispute［di’spju
:t］n. 争论 v. 争论；对…表示异议
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例句 1. If there was a dispute between two families, the parents would hope their children to be with them. 如果两个家庭之间存在争论，父母也许会希望他们的孩子站在自己这边。
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