国际空间站内第一朵花开放-凯发k8官网

国际空间站内第一朵花开放

文章来源：未知文章作者：enread 发布时间：2016-01-20 06:04 字体： [ ]　

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astronauts aboard the international space station have successfully grown a flower, for the first time in orbit.

国际空间站内的宇航员首次成功在站内种植出一株开花的百日菊。

scott kelly of the u.s. space agency nasa tweeted that a zinnia has flowered in the microgravity environment of the orbiting laboratory.

she also tweeted the photo of an orange flower with 13 ¹.

a nasa article explained that zinnias were chosen not for their beauty but to "help scientists understand how plants flower and grow in microgravity."

², other plants such as wheat and romaine ³ have been grown in space.

more crops will be sent to the space station this year, including chinese cabbage and romaine lettuce. nasa says the lessons learned from these plants will help grow tomatoes in 2018.

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收听单词发音

1
n.花瓣( petal的名词复数 )
参考例句：
white petals tinged with blue 略带蓝色的白花瓣 the petals of many flowers expand in the sunshine. 许多花瓣在阳光下开放。来自《现代英汉综合大词典》

2
adv.以前，先前（地）
参考例句：
the bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。 let me digress for a moment and explain what had happened previously.让我岔开一会儿，解释原先发生了什么。

3
n.莴苣；生菜
参考例句：
get some lettuce and tomatoes so i can make a salad.买些莴苣和西红柿，我好做色拉。 the lettuce is crisp and cold.莴苣松脆爽口。