<A snowflake's shape depends on the temperature at which it forms. This type of snowflake, called a sectored plate, forms when the temperate dips below about 5 degrees Fahrenheit (-15 degrees Celsius).
雪花的形状取决于凝结时的环境温度。这种形状被称为“扇盘”，是在大约5华氏度（零下15摄氏度）以下时形成的。
Dendrite snowflakes first occur when the temperature hovers between 30 degrees Fahrenheit (-1 degree Celsius) and 27 degrees Fahrenheit (-3 degrees Celsius).
树枝形雪花是在温度徘徊在华氏30～27度（零下1～3摄氏度）之间形成的。
Snowflakes take on the shape of hollow columns and needles at about 23 degrees Fahrenheit (-5 degree Celsius).
棒形雪花出现在华氏23度（摄氏零下5度）左右
Scientists aren't sure why temperature affects crystal formation and leads to different shapes of snowflakes.
Scientist and photographer Kenneth Libbrecht, chair of the physics department at the California Institute of Technology, studies snowflakes "in the wild" and grows his own under controlled conditions.
[图片欣赏]Snowflakes（雪花）
