以下为句子列表：
英文: After scanning the object image and labeling the connected component, the background and foreground noise could be removed easily by threshold value area expunction.
中文: 该方法仅需对图像作一次全扫描即可标记物体所有连通部分，统计标识号，根据阈值面积消除法即可快速去除图像中所有前景和背景噪声。
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英文: Conventional hearing devices amplify everything—from conversations to background noise to the clock ticking.
中文: 一般的助听器会放大所有的声音—言语声、背景噪声和钟声等。
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英文: Environmental changes due to factors such as climate change are likely to be difficult to identify against the background noise arising from the numerous sources, both natural and man-made, of environmental variability.
中文: 在众多自然及人为因素产生的环境变异源导致的噪音背景下，因气候变化等因素造成的环境变化很难确定。
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英文: Moving object detection will need at least three images, because the detection algorithm would easily confuse random bumps in the background noise or image artefacts with faint, moving objects if it would rely on two images only.
中文: 移动天体检测需要至少三张图片，因为如果在两张图片中确实有小行星，那么检测将很容易被背景噪声或图片暗纹搞混乱。
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英文: So far, the only signals detected are bursts of radiation from stars and a murmur of background noise left over from the big bang.
中文: 到目前为止唯一侦测到的讯号是行星辐射爆发，和宇宙大霹雳之后的背景低声杂音。
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