词典释义：
双语例句
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She strained herself to a final burst of speed.
她倾全力突然加速作最后冲刺。
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A final burst of ecdysone prompts the caterpillar's cells to begin to self-destruct.
蜕皮激素最后一次分泌促使毛毛虫的细胞进行自我分解。