Why are the florets in a sunflower arranged in a double spiral?

Class 12 Brush or Thistle: Fine tubular florets grow parallel to the stem, and are like brushes.

第十二型刷子型: 细管状的小花呈与茎平行生长似刷子形.

Sky fireballs are great storytelling devices. I use them in everything I write.

天空中的火球是个通讯设备, 所有信息都通过它来传播.

Class 9 Spoon: Same as the semi-double, except the ray florets are like spoons at the tips.

第九型匙型: 头花似半重瓣型, 但舌状小花先端为匙形.

The collective nuclear fireballs cooled to yellow and then dull red.

集群核火球冷却到黄色,然后变成暗红.

Class 10 Quill: The florets are straight and tubular with open tips.

第十型翻羽型: 小花先端直管状,全为舌状花.

I Lingheng sound of a hand put fireballs fly.

我冷哼一声,伸手便把火球打飞.

An orchestra usually includes some French horns.

乐队中一般都有法国号.

Children were not permitted to roam around the second and first floors of the White House.

孩子们不允许在白宫的二楼和一楼到处闲逛.

The contrast between Mr Ho's flagships illustrates the way that Macau's gambling market has evolved.

何先生的两家旗舰赌场的差别描绘了澳门赌业的发展方向.

Fundamentalists would say crude is bullish whether it's a 10-week hellogh or low.

不管原油是10周的最高点,还是最低点,基本派都是看涨的.

Privacy Fundamentalists: Over 25 % of consumers who want more privacy laws and opt-in choices.

原宗教主义隐私者: 超过25%的顾客想要更多的隐私法和选择.

B Yes , I think that's one of my favourites, too.

B是呀.那也是我最喜欢的餐厅之一.

Our teacher isn't fair: he always gives the highest marks to his favourites.

我们老师不公正,总是给他喜欢的学生高分数.

These books are great favourites of mine.

这些是我最喜爱的书.

We are starting out as slight favourites, but this doesn't mean anything.

我们开始的时候并不是热门球队, 但这并不意味着什么.

His team are red-hot favourites.

他的队伍是夺冠大热门。

In Monza it rained a lot, the favourites started behind.

在蒙扎下雨了很多, 最开始的后面.

You are one of her favourites, I am afraid, one of her victims also.

你是她的宠幸之一, 而且我怕也是她的受害者之一.

I prefer reading, and my favourites are detective stories.

我比较喜欢看书, 我最喜爱的是侦探小说.

The band played many songs, including some of my favourites.

乐队演奏了许多歌曲, 包括几首我最喜爱的.