A biological agent, such as an infectious microorganism, or a condition that constitutes a threat to human beings, especially in biological research or experimentation.是什么意思_A biological agent, such as an infectious microorganism, or a condition that constitutes a threat to human beings, especially in biological research or experimentation.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句