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Vegetable Secrets
洋葱的秘密:Why do onions make us cry?
因为洋葱在生长时从土壤中吸收了含硫物质。当你切开它,洋葱细胞被破坏,里面的酶会和硫化合物发生化学反应,生成一种叫“催泪因子”的气体,这种气体飘到你的眼睛里,刺激眼睛,于是泪腺分泌泪水来冲洗。
Tips:把洋葱放进冰箱冷藏一会儿再切,低温能让化学反应变慢,减少流泪!
其他蔬菜有秘密吗?请你查查资料,写下你的发现:
(可用汉语回答)
1. Why are carrots good for our eyes?
2. Why do potatoes turn green in the sun?

Vegetable Secrets
洋葱的秘密:Why do onions make us cry?
因为洋葱在生长时从土壤中吸收了含硫物质。当你切开它,洋葱细胞被破坏,里面的酶会和硫化合物发生化学反应,生成一种叫“催泪因子”的气体,这种气体飘到你的眼睛里,刺激眼睛,于是泪腺分泌泪水来冲洗。
Tips:把洋葱放进冰箱冷藏一会儿再切,低温能让化学反应变慢,减少流泪!
其他蔬菜有秘密吗?请你查查资料,写下你的发现:
(可用汉语回答)
1. Why are carrots good for our eyes?
Carrots are good for our eyes because they have vitamin A in them.(胡萝卜对眼睛有益,因为它们富含维生素A。)
2. Why do potatoes turn green in the sun?
Because potatoes produce chlorophyll under the sun, which makes them turn green, and green potatoes may have solanine that is bad for our body.(因为土豆在阳光下会产生叶绿素,导致其表皮变绿,而变绿的土豆可能含有对人体有害的龙葵素。)(答案不唯一,合理即可)
答案
1. Carrots are good for our eyes because they have vitamin A in them.
(胡萝卜对眼睛有益,因为它们富含维生素A。)
2. Because potatoes produce chlorophyll under the sun, which makes them turn green, and green potatoes may have solanine that is bad for our body.
(因为土豆在阳光下会产生叶绿素,导致其表皮变绿,而变绿的土豆可能含有对人体有害的龙葵素。)
(答案不唯一,合理即可)
(胡萝卜对眼睛有益,因为它们富含维生素A。)
2. Because potatoes produce chlorophyll under the sun, which makes them turn green, and green potatoes may have solanine that is bad for our body.
(因为土豆在阳光下会产生叶绿素,导致其表皮变绿,而变绿的土豆可能含有对人体有害的龙葵素。)
(答案不唯一,合理即可)
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