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在观察了多年以后,他们相信这个洪水控制系统可以有效地防止洪水。(convince) After years of observation,they are convinced that this flood control system can effectively prevent floods.After years of observation,they are convinced that this flood control system can effectively prevent floods.
【考点】固定搭配/句型.
【答案】After years of observation,they are convinced that this flood control system can effectively prevent floods.
【解答】
【点评】
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发布:2024/5/23 20:38:36组卷:2引用:0难度:0.8