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- A carotenoid, it is a itamin A precursor, which the body conerts into itamin A. 一种类胡萝卜素，是维生素A的前体，在体内可转化成维生素A。
- Choosing varieties that have this mutated gene can provide on average three-fold higher levels of provitamin A, the researchers said. 研究人员表示:从含有这个突变基因的品种中选择能提供平均3倍更高水平的维他命原A.
- A carotenoid called lycopene, which tomatoes contain in abundance, appeared to be responsible. 这是因为番茄富含一种叫番茄红素的类胡萝卜素。
- It‘s still founded that peas contains ample provitamin A which can convert into vitamin A in the body and thus in turn keep the skin replenished with moisture. 现代研究更是发现，豌豆含有丰富的维生素A原，维生素A原可在体内转化为维生素A，起到润泽皮肤的作用。
- They’re loaded with beta-carotene, a carotenoid that turns into the usable form of vitamin A in the body and can protect your heart and vision. 它们含有胡萝卜素,一种能转化成有用维生素A的类胡罗卜素,可以保护心脏和视觉。
- Slow down aging with salmon. Salmon contains astaxanthin, a carotenoid that improves skin elasticity, so you'll have fewer fine lines. 使用鲑鱼减缓老化。鲑鱼中含有的虾青素，一类胡萝卜素，可以改善皮肤弹性，因此你将会减少细纹。
- Macular Degeneration: a carotenoid called lutein - which is found mostly in leafy greens - may help prevent the deterioration of the retina that causes blindness in older people. 黄斑退化症多数叶菜类中均可发现的类胡萝卜素黄体素,可以帮助预防视网膜退化,这种疾病经常造成老人失明。
- A common existing technique for assessing the provitamin A content of corn varieties can be prohibitively expensive for plant breeders, the researchers said, but the new one is vastly less expensive. 研究人员表示:对于植物育种来说;用现有通用的技术对玉米品种中的维他命原A含量进行评估是过于昂贵的.;而新方法却是大大地便宜了
- Tomato Sauce: Men who are tomato sauce two to four times per week had a 35 percent lower risk of developing prostate cancer than men who are none. A carotenoid called lycopene, which tomatoes contain in abundance, appeared to be responsible. 番茄酱：每周吃2－4次番茄酱的男性，患前列腺癌的可能性比不吃番茄酱的人少35%25，这是因为番茄富含一种叫番茄红素的类胡萝卜素。
- There is a vein of melancholy in his character. 他的性格中有少许忧郁的气质。
- Tomato Sauce: Men who are tomato sauce two to four times per week had a 35 percent lower risk of developing prostate cancer than men who are none. A carotenoid called lycopene,which tomatoes contain in abundance,appeared to be responsible. 番茄酱：每周吃2－4次番茄酱的男性，患前列腺癌的可能性比不吃番茄酱的人少35%25，这是因为番茄富含一种叫番茄红素的类胡萝卜素。
- There was a long lag in forwarding mail to us. 转寄给我们的邮件晚了很久才拿到。
- A bowl of hot chicken soup is good for you. 喝一碗热鸡汤对你有好处。
- A cloud is a mass of vapor in the sky. 云是天空中的水汽团。
- A country must have the will to repel any invader. 一个国家得有决心击退任何入侵者。
- A fire was burning in the grate. 火在壁炉中燃烧着。
- They cleaved a path through the wilderness. 他们在荒原中开辟出一条路。
- They denounced him to the police as a criminal. 他们向警方告发他是罪犯。
- This place doesn't have a very savory reputation. 这个地方的名声可不太好。
- This strain of wheat can grow during a cold spring. 这种小麦可以在寒冷的春天生长。
