ADVERB | PHRASESADVERB➤gently, slightly輕輕擺動▸➤about, along上下擺動◇An old cigarette pack bobbed along in the current.一個舊香煙盒順水起伏漂流。PHRASES➤bob up and down上下波動◇The small boats bobbed gently up and down in the bay.小船在港口輕輕顛簸晃動。
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