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1 Primary & Middle School Mathematics1–9 年级在线 2 High School Mathematics10–12 年级在线 3 University Mathematics — Year 1本科一年级在线 4 University Mathematics — Year 2本科二年级在线 5 University Mathematics — Year 3本科三年级在线

1 Primary & Middle School Physics1–9 年级在线 2 High School Physics10–12 年级在线 3 University Physics — Year 1本科一年级在线 4 University Physics — Year 2本科二年级在线 5 University Physics — Year 3本科三年级在线

1 School Chemistry — Grades 1 to 121–12 年级在线 2 University Chemistry — Year 1本科一年级在线 3 University Chemistry — Year 2本科二年级在线 4 University Chemistry — Year 3本科三年级在线

1 Primary & Middle School Biology1–9 年级在线 2 High School Biology10–12 年级在线 3 University Biology — Year 1本科一年级在线 4 University Biology — Year 2本科二年级在线 5 University Biology — Year 3本科三年级在线

1 Primary & Middle School Earth and Space Sciences1–9 年级在线 2 High School Earth and Space Sciences10–12 年级在线 3 University Earth and Space Sciences — Year 1本科一年级在线 4 University Earth and Space Sciences — Year 2本科二年级在线 5 University Earth and Space Sciences — Year 3本科三年级在线

1 Markets I: The Ecosystem and Exchange-Traded Markets市场在线 2 Markets II: Rates, FX and Credit市场在线 3 Markets III: Commodities, Energy and Crypto市场在线 4 Quantitative Methods方法在线 5 Derivatives and Volatility衍生品在线 6 Rates, Credit, XVA and Risk利率、信用与风险在线 7 Research Craft: Predictors, Backtests, Measurement, Portfolios研究在线 8 Strategies I: Equities and Futures策略在线 9 Strategies II: Volatility, Relative Value, Macro and the Bank Desks策略在线 10 Microstructure and Execution交易执行在线 11 Market Making and High-Frequency Trading做市在线 12 Machine Learning for Markets机器学习在线 13 Low-Latency Software技术在线 14 Networks, Hardware and Trading Infrastructure技术在线 15 Research, Data and Risk Platforms技术在线 16 The Desk and the Firm公司运营在线 17 The Industry: Firms, Roles and Careers职业发展在线 18 Interviews I: Maths, Probability and Speed职业发展在线 19 Interviews II: Markets, Trading Games and the Final Round职业发展在线 20 Interviews III: Code职业发展在线

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Earth and Space Sciences · 术语表

什么是 Rain gauge？

Definition 7.7 Primary & Middle School Earth and Space Sciences · 第 7 章 — Clouds, Rain and Snow

A rain gauge is a container that collects the rain falling on its opening. The depth of water it collects is measured in millimetres: “5 millimetres of rain” means that the rain would have made a layer of water 5 millimetres deep on flat ground, if none of it had run off or soaked in.

A simple rain gauge: a funnel catches the rain and a tube marked in millimetres holds it. Read the level of the water, with your eye at the same height. Here, 24 millimetres have fallen since the gauge was last emptied.

示例

Example 7.12 (A week of rain at school)

The class read the rain gauge every morning for a week and found: Monday 0, Tuesday 4, Wednesday 12, Thursday 7, Friday 0, Saturday 2, Sunday 5 millimetres. The wettest day was Wednesday. It did not rain on Monday nor on Friday. In the whole week, $0 + 4 + 12 + 7 + 0 + 2 + 5 = 30$ millimetres fell. Wednesday alone brought 12 of the 30 millimetres, that is $\frac{12}{30} = \frac{2}{5}$ of the week’s rain.

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