In recent years， mathematicians and scientists have begun campaigns to mark certain dates in celebration of significant principles and here are a few to add to your calendar.

近年來(lái)，數(shù)學(xué)家和科學(xué)家為某些特定日期發(fā)起一些活動(dòng)以慶祝那些有重大意義的定律。這里有一些可以添加到你的日歷中。

Mole Day 摩爾日

Mole Day is celebrated annually on Oct. 23 from 6：02 am to 6：02 pm. It remembers Avogadros Constant （6.02×10??）， which is a basic measuring unit in chemistry. A mole of any substance contains Avogadros number of elementary particles.

The concept of the celebratory day was created by Maurice Oehler， a retired high school chemistry teacher from Wisconsin， the US. The Mole Day was created in 1991 and has been honored every year since then. Each Mole Day has a specific theme. People hope to use the day to develop interest in chemistry， encouraging schools around the globe to celebrate Mole Day with various activities related to chemistry.

摩爾日的慶祝通常是在10月23日的上午6：02到下午6：02，以紀(jì)念阿伏伽德羅常量（6.02×1023）。阿伏伽德羅常量是化學(xué)中的一個(gè)基本測(cè)量單位。每一摩爾任何物質(zhì)含有阿伏伽德羅常量個(gè)微粒。

慶祝這一節(jié)日的想法由莫里斯·奧勒爾提出，他是來(lái)自美國(guó)威斯康星州的一位退休高中化學(xué)老師。摩爾日創(chuàng)立于1991年，此后每年都被慶祝。每一屆摩爾日都有不同的主題。通過(guò)鼓勵(lì)世界各地的學(xué)校開(kāi)展各種與化學(xué)相關(guān)的活動(dòng)來(lái)慶祝摩爾日，人們希望用這一天來(lái)培養(yǎng)人們對(duì)化學(xué)的興趣。

Square Root Day 平方根日

Square Root Day is a holiday that heartily honors those dates where the combination of day and month and year forms square roots： e.g. 2/2/2004 and 3/3/2009. The last Square Root Day was 4/4/2016 and the next one will be 5/5/2025.

The holiday was created by a high school teacher Ron Gordon in California， the US. Square Root Day now has its own website where celebrants can gather.

平方根日，就是日、月均為年份最后兩位數(shù)構(gòu)成的數(shù)字的平方根，如2004年2月2日、2009年3月3日。上一次的平方根日是2016年4月4日，下一次的平方根日將在2025年5月5日。

平方根日由美國(guó)加利福尼亞州的高中老師羅恩·戈登創(chuàng)立?，F(xiàn)在設(shè)立有平方根日網(wǎng)站，人們可以在那里慶祝。

Fibonacci Day 斐波那契日

November 23 is Fibonacci Day， an annual holiday that honors one of the most influential mathematicians of the Middle Ages—Leonardo Fibonacci.

The Fibonacci sequence， also known as the rabbit sequence， the golden section sequence， refers to a sequence such as： 1，1， 2， 3， 5， 8，13， 21... In this sequence， the value of each number is equal to the sum of its two preceding numbers. It was discovered by Fibonacci in Pisa， Italy， and has direct applications in modern physics， quasicrystal structure， chemistry and other fields.

11月23日是斐波那契紀(jì)念日，該節(jié)日每年被慶祝，以紀(jì)念中世紀(jì)最有影響力的數(shù)學(xué)家之一——列昂納多·斐波那契。

斐波那契數(shù)列，又稱(chēng)兔子數(shù)列，黃金分割數(shù)列，指的是這樣一個(gè)數(shù)列：1，1，2，3，5，8，13，21…。在這個(gè)數(shù)列中，每一個(gè)數(shù)字的值都等于它前面兩個(gè)數(shù)字的和。該數(shù)列是由意大利比薩市的斐波那契發(fā)現(xiàn)的，在現(xiàn)代物理、準(zhǔn)晶體結(jié)構(gòu)、化學(xué)等領(lǐng)域，斐波那契數(shù)列都有直接的應(yīng)用。

Pi Day 圓周率日

As a significant day for “math-man”， March 14th is the day that cant be missed. It is identified as the International Pi Day. The earliest known large-scale Pi-themed celebration was organized by Larry Shaw， a physicist on March 14th， 1988， at the San Francisco Science Museum.

On March 12th， 2009， the US House of Representatives passed a resolution declaring March 14th as National Pi Day.

作為“數(shù)學(xué)人”的重大節(jié)日，3月14日不可錯(cuò)過(guò)，它是一年一度的國(guó)際圓周率日。已知最早的大型的以圓周率為主題的慶?；顒?dòng)是由物理學(xué)家拉里·肖于1988年3月14日組織，在舊金山科學(xué)博物館舉行。

2009年3月12日，美國(guó)眾議院通過(guò)一項(xiàng)決議，聲明3月14日是全國(guó)圓周率日。

Word Study

preceding /pr?'si?d??/ adj. 在前的，前面的

This point has been dealt with in the preceding paragraph.

resolution /'rez?'lu??n/ n. 決議；正式?jīng)Q定

The committee have passed a resolution that conditions should be improved.