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A toxin produced by bacteria that is specific for intestinal cells and causes the vomiting and diarrhea associated with food poisoning.
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肠毒素由只限于肠结胸的细菌而产生的毒素，引起呕吐和腹泻并导致食物中毒 |
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A toxin that damages or destroys nerve tissue.
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神经毒素损害或破坏神经组织的毒素 |
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A toy instrument with a membrane that produces a sound when a player hums or sings into the mouthpiece.
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卡祖笛一种当吹奏者向吹口处低吟或哼唱时一个膜能够发出声音的玩具乐器 |
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A track called My Petitiontells the story of a young boy's letter to the President.
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有一首叫做《我的恳求》的歌，讲述了一个小男孩写信给总统的故事。 |
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A track event in which contestants compete in walking a specified distance.
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竞走比赛一种径赛运动，参加者以走的方式在一段固定的距离内竞争 |
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A track from a three-toed dinosaur believed to be about 70 million years old has been discovered in Denali National Park, the first evidence that the animals roamed there, scientists said.
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美国科学家日前表示，一块被认为是7000万年前的恐龙脚印化石在阿拉斯加州的德纳里峰国家森林公园现身。这表明该地区曾经生活着恐龙。 |
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A track providing a runway for wheeled equipment.
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轨道为装有轮子的设备提供跑道的轨道 |
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A tracking dog helped find twelve-year-old Michael Auberry on a wooded ridge, weak and dehydrated about a mile from where he wandered away.
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在一只追踪犬的帮助下，12岁的迈克尔·奥布里在一个距其迷路1公里的一处树木茂密的山腰上被找到，身体虚弱并处于脱水状态。 |
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A tract of land in certain North American colonies with hereditary rights granted to the proprietor by royal charter.
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永久租地某些北美殖民地的一种地契，通过皇家宪章赋予土地所有者以继承权 |
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A tract that may be owned, together with everything growing or constructed on it.
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地域包含生长于其上的所有的东西或建筑的一片土地 |
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A tractor is a powerful vehicle used in agriculture.
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拖拉机是一种大功率的农用工具。 |
