名词
中文翻译：Unknown
同义词：
['suspicious species', 'uncertain species']
例句：
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1.The discovery of a new species has sparked excitement among scientists.
新物种的发现激发了科学家的兴奋。
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2. The researchers are still unsure about the origins of this doubtful species.
研究人员仍然不确定这种可疑物种的起源。
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3. The government is considering introducing regulations to protect these doubtful species from extinction.
政府正在考虑引入法规，以保护这些有疑虑的物种免受灭绝。