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пи Pӛ

l(f)rg:2017-05-26݋f

בԓЧӛ Pӛ?СVĂɲ֪и ӛPӛļ!gӭx!

һfи ԇһsectionһԒ̓ɂvЌԒֵLͨ2-3nvtҪLһЩЩ_5-6҂֪֣и 헟oՓǂ俼߀yȶǷdz σ漰VҌI(y)ԘO@ҪHҪ֪֪ҪƼˇvʷ˽

ȻҪϵ֪RȫĻDzܵ҂ľǏ ȡP֪R@rӛPӛ׃҂Qи ԇPI@Ҳи ώڽ̌WЏ{ӛPӛҪԵԭ򡣟oՓ뱣15ֵĿ߀_30ֵĿֻҪҪʴ_İи µ挍xPӛɲ

ӛPӛT̎Ԏ㼯ע߀Լӏ̕rӛԎ ϵļ(ji)λcǣǷذl(f)FԼһmȻ µĕr^βӛ˺ܶPӛsΨ]ӛc?}rl(f)FԼȻԼĹPӛ?ֻһӛPӛ© ܶ༚(ji)ºƒ Լ߉݋Ҳy?

һ ԒӛPI~

vӛи Pӛķrώһһ_ʼ͕V㣺ӛPI~ļ^PI~һָһЩҪČ~f~~~ͷ~Ȼ@Ҫעǣ҂Ҫ @Ȼͬ׽סĂ~@ҪϢ@ĿPI~}rؑ

eČԒWώԃӌώٵfһBҊ@ͺܿܳx}@r҂ҪڹPӛwFеҊô҂ԓӛЩ~?

Student: Do you have any advice on how I should cover the story?

Advisor: Well, Max will want to talk to you but I am sure he will tell you to find out things like why the physics department's worried about enrollment?Has the number of students been getting smaller in recent years? By how much? What kinds of plans are they considering to address this problem?

τfķ挦ԒЮֵľwҊҪӛ~Rԓ@ӣworried?No. stu?how?plan?

ӛ䛾߉݋Pϵ~׳c

߉݋BһƪµĽ}jÿһƪи ¶֔ŒӴκ߉݋Pϵ֮gҊ߉݋PϵD혳e߉݋ͨ^߉݋~߉݋ZwFһF߉݋~ͺܸܿc

 ߉݋~Ѹӛ܉ʹƒȲPϵһĿȻ

õѸӛ䛾g߉݋Pϵķͨ^N̖磺

Ѵõ߉݋R܉ճҊ߉݋~ԼZ@ӟoՓڜyԇx Zֵĕrһ(yu)܉ƽr Ӗע⿂Y@Щ߉݋~ͶZ÷\ԼĿZ͌һ܉M߷֙n

 ĄemYcӛҪϢ

ŴͬW@ӵw҂ µ^ һ̫Ć~ӕr˼Sͣ@~ͬr© ˽ϢȻ^񃺁Űl(f)Fѽ֪făȥ

䌍и ԇFҪϢƧĆ~ĕrvԒ߽^󲿷r¶ԽǷͽ@Ϣ~҂Ҫľ ~ĕrסě_Ӳ^Ƥ  ~Ľ֮ڹPӛӛҪϢ҂Ҫעи зͳFጵϢһҪϢOпǿcҲҪ҂cӛPӛĵط

ώoeһӡֱܷĶfˎׂҪϢ?

Ok, a lot of people think of earth’s orbit around the sun as being perfectly circular, as smooth and as regular as, say, the way that hands move on a well-made watch, but it just doesn’t work that way. You are probably aware that the earth’s orbit around the sun, it is not shaped like a perfect circle. It is more of an oval, it is elliptical. But the shape of this orbit isn’t consistent; it varies over time, over a period of about a thousand years. Sometimes it is a little more circular, sometimes it is more elliptical. And when earth’s orbit is more elliptical, earth is actually closer to the sun during part of the year. Which makes earth, and in particular, the northern hemisphere, warmer. And why is that important? Well, because most of the planet’s glaciers are in the northern hemisphere, and if it gets too warm, then glaciers will stop forming. And we’ve already talked about how that affects earth’s overall temperature.

䌍e@@ôL䌍ֻ_ҪϢҲfw{ֻcIJֶnjcĽ

һϢ@̫ꖵ܉ǙEAεԭ5Ԓͽ@ϢmȻFƧĆ~oval}¿ һ^Ҋellipticalጡ£

Ok, a lot of people think of earth’s orbit around the sun as being perfectly circular, as smooth and as regular as, say, the way that hands move on a well-made watch, but it just doesn’t work that way. You are probably aware that the earth’s orbit around the sun, it is not shaped like a perfect circle. It is more of an oval, it is elliptical.

ڶϢ@܉Π׃@5ԒͽጣгFһ΢ЩyȵĆ~consistentҷֹЩJR@~}ֿĵĽo@FЕr@܉ΠAcЕrEAcEAcĕrӽ̫ꖡ@fľ҂ЌW֪RеĽc@

But the shape of this orbit isn’t consistent; it varies over time, over a period of about a thousand years. Sometimes it is a little more circular, sometimes it is more elliptical. And when earth’s orbit is more elliptical, earth is actually closer to the sun during part of the year.

ϢΠ׃Ӱ푵ϱγɡfԒһ5Ԓ@Ϣ㲻֪@Ҫc߀˷

Which makes earth, and in particular, the northern hemisphere, warmer. And why is that important? Well, because most of the planet’s glaciers are in the northern hemisphere, and if it gets too warm, then glaciers will stop forming. And we’ve already talked about how that affects earth’s overall temperature.

mȻ @ô~R;䌍ĹPӛҪӛֻ@ҪϢɴ˿֪ETSһԻĵĽM ϢĕrҪ¸҈ԛQ^m(x) ˼SҪͬrfԒ^ܳFԼ˼Sӡ

˽и v}·ДŲy

и vֵ·к܏Ҏ(gu)Եģһf֞6E

һϹ(ji)n

ڶ~(@(ji)n})

B@~(һNFvʷ¼)

IJͨ^eķʽ߽B̵ķʽU}ľw

岽v^дWᆖώԼᆖ֮o (ÿᆖ̎ܿǿc)

}MпYA(ᵽv}^ȥδaӰ푻hx)

˽и vֵ·ҪƽrĹPӛӖ^Rذ Ϣw{M@·@܉õذ½Y܉_] ÿһϢҲ}ľ

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