名词
中文翻译：波浪低谷
同义词：
['trough', 'low tide', 'trough of the ocean例句：1. The wave depression caused the sea to rise and fall violently.（波浪低谷导致海水剧烈起伏。）']
例句：
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1. The wave depression caused the sea to rise and fall violently.
波浪低谷导致海水剧烈起伏。
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2. During the low tide, the beach was empty except for a few crabs.
在低潮时，海滩上除了几只螃蟹外一片空荡。
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3. The trough of the ocean is where the currents converge, creating strong winds.
海洋的低谷是水流交汇的地方，那里风力强劲。