[明]字雪舫，南海（今广州）人。顺长子。工画兰竹石及翎毛。
生物钟学(Chronobiology)或“生物计时”是研究活生物种的内在节律。
Chronobiology or "biological timing" is the study of internal rhythms in living organisms.
正态分布是典型的钟形曲线，这在统计学中经常出现。
A normal distribution is the classic bell curve that appears so frequently in statistics.
在统计学中，风险管理的标准方法是基于“钟形曲线”（或曰正态分布）的，绝大多数结果分布在中间，极端情况十分罕见。
The standard statistical approach to risk management is based on a “bell curve” or normal distribution, in which most results are in the middle and extremes are rare.
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